Even if  you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

   You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you. 来源：

   Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around. 来源：

   Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape (逃出) the earth’s gravity and carry you into space. 来源：

In this passage, the word “gravity” means_______.来源：

   A. the pull of everything.           B. the force of attraction(吸引) among objects.

   C. the force which attracts objects towards the centre of the earth来源：

   D. the force which attracts the earth towards the sun.

When you slip(滑) you always fall to the ground because________来源：

   A. the earth always turns round.                   B. the earth has gravity

   C. the earth’s gravity is greater than your weight.     D. you are careless. 来源：

Gravity is strong that_______

   A. it can throw a ball into the air.           B. it makes you jump only seven feet.

   C. it can let you fly away from the earth.     D. it can keep everything on earth.

Because of gravity,________

   A. water flows everything.            B. we can go everywhere by ship. 来源：

   C. water always flows downwards.     D. fish can live in water.

We can get away from the earth by spaceship because________

   A. the spaceship goes very fast.       B. the earth can’t pull the spaceship.

C. the spaceship has a strong force.    D. the spaceship can jump higher than others.

Even if you are an experienced backpacker or climber，you need to know what to do if something goes wrong．It is not that Alaska is that much more dangerous than other places．It is no more hazardous than elsewhere，as long as the proper precautions(预防措施)are taken．So, being prepared is crucial to ensure a safe trip．
First of all，make sure you pack everything you will need for your trip．Even if you are traveling by car，pack clothes and gear for backpacking．Because of the bad weather, cars break down frequently. Pack a survival(生存)kit full with：a down coat, boots ,mittens, a hat, snow-pants，sleeping bags，candles，a flashlight，and high-energy food. If you are traveling by car , also pack extra belts, a shovel, and a chain.
If you are camping or hiking，make sure you know how to avoid bears．If you are lost in the wilderness, there is no doubt you will encounter them.
However，there is no need to be nervous．Just take these precautions：make noise as you walk，bears will avoid you；cook your food away from where you sleep，and store your food away from where you sleep，so the bears are not attracted．Both of these should keep the bear away．However，if you do encounter a bear，there are two different schools of thought．One is to make noise and scare the bear away．The other is to stand still and speak softly to get the bear to leave．If you are dealing with a brown bear，you can climb a tree，since it cannot follow．But，black bears can climb．If for some reason the bear attacks，play dead．Try to protect your head and neck，and hopefully the bear will leave its“dead” prey.
【小题1】The underlined word “hazardous” in Paragraph l most probably means________．

A．interesting

B．dangerous

C．wonderful

D．important

【小题2】The author seems to tell us in Paragraph 2 that________．

A．it is more dangerous to travel by car

B．the weather is always bad while traveling

C．it is necessary to take whatever you need

D．the car breaks down often while traveling

【小题3】Yon should prepare your food away from where you sleep so that________．

A．the bear can’t find you by the smell of the food

B．you can have a better sleep at night

C．the bear can’t find out your food easily

D．you can protect the food you bring with you

【小题4】All the following can most probably protect you EXCEPT that________．

A．you can try to make noise as possible as you can

B．you can say something in a soft voice to the bear

C．you can try to learn to climb up a tall tree nearby

D．you can pretend to be dead when you are in danger

【小题5】Which of the following is the main idea of this passage?

A．There are some tips to survive in Alaska’s wilderness．

B． The bears in Alaska’s wilderness are very dangerous．

C．Something should be taken along while traveling by car．

D．You should learn how to protect yourself．

Even if you are an experienced backpacker or climber，you need to know what to do if something goes wrong．It is not that Alaska is that much more dangerous than other places．It is no more hazardous than elsewhere，as long as the proper precautions(预防措施)are taken．So, being prepared is crucial to ensure a safe trip．

First of all，make sure you pack everything you will need for your trip．Even if you are traveling by car，pack clothes and gear for backpacking．Because of the bad weather, cars break down frequently. Pack a survival(生存)kit full with：a down coat, boots ,mittens, a hat, snow-pants，sleeping bags，candles，a flashlight，and high-energy food. If you are traveling by car , also pack extra belts, a shovel, and a chain.

If you are camping or hiking，make sure you know how to avoid bears．If you are lost in the wilderness, there is no doubt you will encounter them.

However，there is no need to be nervous．Just take these precautions：make noise as you walk，bears will avoid you；cook your food away from where you sleep，and store your food away from where you sleep，so the bears are not attracted．Both of these should keep the bear away．However，if you do encounter a bear，there are two different schools of thought．One is to make noise and scare the bear away．The other is to stand still and speak softly to get the bear to leave．If you are dealing with a brown bear，you can climb a tree，since it cannot follow．But，black bears can climb．If for some reason the bear attacks，play dead．Try to protect your head and neck，and hopefully the bear will leave its“dead” prey.

1.The underlined word “hazardous” in Paragraph l most probably means________．

A．interesting

B．dangerous

C．wonderful

D．important

2.The author seems to tell us in Paragraph 2 that________．

A．it is more dangerous to travel by car

B．the weather is always bad while traveling

C．it is necessary to take whatever you need

D．the car breaks down often while traveling

3.Yon should prepare your food away from where you sleep so that________．

A．the bear can’t find you by the smell of the food

B．you can have a better sleep at night

C．the bear can’t find out your food easily

D．you can protect the food you bring with you

4.All the following can most probably protect you EXCEPT that________．

A．you can try to make noise as possible as you can

B．you can say something in a soft voice to the bear

C．you can try to learn to climb up a tall tree nearby

D．you can pretend to be dead when you are in danger

5.Which of the following is the main idea of this passage?

A．There are some tips to survive in Alaska’s wilderness．

B． The bears in Alaska’s wilderness are very dangerous．

C．Something should be taken along while traveling by car．

D．You should learn how to protect yourself．

 

D

As school fl,tats again，there’s SO much mole for an American parent to nag(唠叨)about，like

homework，bedtime and lost hours on the Intemet．But in the age of digital childhood，Jacky Long-well，45，of McLean，Virginia，often text—messages(发短信)what she OnCe told her children bymouth_"Be nice to your brother；walk the dog；remember your reading．

This is the world of the modem family，in which even reminding children to do something has

become electronic．

There  are changes in how parents nag and in what they nag about and in the frequency of their

nagging．

With technology，“you nag more，and you are a little bit more：precise with your nagging．’’said

Reginald  Black，46，of Woodbridge，Virginia．

For many young people，electronic nagging is part of the experience of growing up．Charles Flowers，17，131．$enior at St．John“College High School in Washington．says his mothel-reminds him about everything from laundry，being Oil time to baseball practice and mowing the lawn by text．

When she uses capitals he knows she is serious：GET HOME!

Some say technology has made nagging less annoying．

Jaeky Longwell thinks texts ale less emotional than spoken messages and less likely to be resisted by teenagers．

It’s not as painful for them to hear it by text．It becomes grouped with the friendly communication，”she said．“They can’t hear the nagging．”

She thinks a good way to do it is to mix friendliness with nagging．A parent Call always start by

saying hello．

Not all parents like the new electronic r,agging．Joyce Bouehard，51，a mother of four in Fairfax，Virginia，texts her 14一year—old son but says that for many  things — chores，homework— the

old—fashioned way works better．Nagging by text has risks，she notes：I always think，if you are texting them something and they are with their friends，they ale getting a big laugh out of it．’’

68．We can conclude from the first two paragraphs that————————．

A．American children often stay up late studying

B．Jacky Long'well had a happy aigital childhood

C．American parents pay too much attention to their children’s studies

D．American parents think a lot about their children’s characters

69．The example of Reginald Black is used to show readers————————．

A．that her nagging is thoughtful

B．how the amount and kind of nagging have changed with the arrival of the digital age

C．the kind of skills a parent needs to nag effectively

D．that she likes nagging her children very much

70．We can infer that—————————．

A．It’S better for parents to nag in a friendly,way

B．whether、nagging is e]ectronic or not，it is annoying

C．American parents generally don’t like to nag

D．American parents like to llse capital letters in messages

7 1．The main idea of the article is———————一．

A．the subjects American parents like to nag about

B．the reaSOliS American parents like to nag their children

C．that electronic nagging is becoming commoll in the U．S

D．how American parents began to nag their children by text messages

  

  D

  As school fl,tats again，there’s SO much mole for an American parent to nag(唠叨)about，like

 homework，bedtime and lost hours on the Intemet．But in the age of digital childhood，Jacky Long-well，45，of McLean，Virginia，often text—messages(发短信)what she OnCe told her children bymouth_"Be nice to your brother；walk the dog；remember your reading．

  This is the world of the modem family，in which even reminding children to do something has

 become electronic．

  There  are changes in how parents nag and in what they nag about and in the frequency of their

 nagging．

  With technology，“you nag more，and you are a little bit more：precise with your nagging．’’said

 Reginald  Black，46，of Woodbridge，Virginia．

  For many young people，electronic nagging is part of the experience of growing up．Charles Flowers，17，131．$enior at St．John“College High School in Washington．says his mothel-reminds him about everything from laundry，being Oil time to baseball practice and mowing the lawn by text．

   When she uses capitals he knows she is serious：GET HOME!

  Some say technology has made nagging less annoying．

  Jaeky Longwell thinks texts ale less emotional than spoken messages and less likely to be resisted by teenagers．

  It’s not as painful for them to hear it by text．It becomes grouped with the friendly communication，”she said．“They can’t hear the nagging．”

  She thinks a good way to do it is to mix friendliness with nagging．A parent Call always start by

saying hello．

  Not all parents like the new electronic r,agging．Joyce Bouehard，51，a mother of four in Fairfax，Virginia，texts her 14一year—old son but says that for many  things — chores，homework— the

old—fashioned way works better．Nagging by text has risks，she notes：I always think，if you are texting them something and they are with their friends，they ale getting a big laugh out of it．’’

68．We can conclude from the first two paragraphs that————————．

  A．American children often stay up late studying

  B．Jacky Long'well had a happy aigital childhood

  C．American parents pay too much attention to their children’s studies

  D．American parents think a lot about their children’s characters

69．The example of Reginald Black is used to show readers————————．

  A．that her nagging is thoughtful

  B．how the amount and kind of nagging have changed with the arrival of the digital age

  C．the kind of skills a parent needs to nag effectively

  D．that she likes nagging her children very much

70．We can infer that—————————．

  A．It’S better for parents to nag in a friendly,way

  B．whether、nagging is e]ectronic or not，it is annoying

  C．American parents generally don’t like to nag

  D．American parents like to llse capital letters in messages

 7 1．The main idea of the article is———————一．

  A．the subjects American parents like to nag about

  B．the reaSOliS American parents like to nag their children

  C．that electronic nagging is becoming commoll in the U．S

  D．how American parents began to nag their children by text messages