BEING an astronaut sounds cool, doesn't it? In space, they get to do some pretty amazing things, like floating in zero gravity(重力).

However, there are also plenty of things that astronauts can't do because of their weightless environment, and that's very sad. What's worse, they can't even let their sadness show, because it's impossible to cry in zero gravity.

Of course, astronauts can still produce tears. But crying is much more difficult in space, according to The Atlantic(大西洋月刊) in January. Without gravity, tears don't flow(流动) down out of the eyes like they do here on Earth. This means that when you cry in space, your tears have nowhere to go-they just stick(粘) to your eyes.

In May 2011, astronaut Andrew Feustel experienced this during one of his spacewalks. "Tears," he said, "don't fall off of your eyes...They just kind of stay there."

Besides making your vision(视线)unclear, this can also cause physical pain. Back on Earth, tears are supposed to bring comfort to the eyes. But that's not the case in space. The space environment dries out astronauts' eyes, and when tears suddenly wet the eyes, it can cause pain rather than comfort. "My right eye is stinging(刺痛) like crazy," Feustel told his teammate during the walk.

Since gravity doesn't work in space, astronauts need some extra help to get rid of（除去） the tears. Feustel chose to rub his eyes against his helmet to wipe(擦) the tears away. Another choice is to just wait-"When the tears get big enough they simply break free of the eyes and float around," astronaut Ron Parise told The Atlantic.

There are lots of small things-things like crying-that we are so used to on Earth. We usually take them for granted until they become a problem in a totally different environment, like space.  There, astronauts can't talk to each other directly. They also can't eat or drink in normal ways. They can't even burp (打嗝), because there is no gravity to hold the food down in their stomach. If they do burp, they just end up throwing up（呕吐）everything in their stomach, according to the UK National Space Center.

Therefore, perhaps it's only space explorers who can honestly say: "Gravity, you're the best."

1.From Paragraphs 2 and 3 , we can know that_______.

A．astronauts are unable to feel sad in space

B．astronauts produce fewer tears in space

C．tears produced in space flow down more slowly

D．tears produced in space don't flow downward

2.What effect do tears have on astronauts?

A．They cause physical pain.

B．They bring comfort to them.

C．They make their vision clearer.

D．They float around and cause trouble.

3.The underlined phrase "take them for granted" in paragraph 7 means _______.

A．find them important

B．consider them useless

C．need them during an emergency

D．fail to notice their presence(存在)

4.The second-to-last paragraph (paragraph 7) is mainly about_______.

A．suggestions of how astronauts can stay comfortable in space

B．other basic things that are difficult to do in space

C．why burping is impossible in space

D．things human can't do without gravity

 

Food is very important. Everyone needs to   36  well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is   37  . We begin to get knowledge(知识) even when we are very young. Small children are  38  in everything around them. They learn  39   when they are watching and listening. When they are getting older, they begin to 40  story books, science books and anything they like. When they find something new, they love to ask questions and __41  to find out the answers.

What is the best  42  to get knowledge? If we learn by ourselves（自学）, we will__43 _the most knowledge. If we are  44  getting answers from others and do not ask why, we will not learn well. When we study in the right way, we will learn __45  and understand better.

1.	A．sleep B．read C．drink D．eat

 

2.	A．sport B．exercise C．knowledge D．meat

 

3.	A．interested B．interesting C．weak D．better

 

4.	A．everything B．something C．nothing D．anything

 

5.	A．lend B．read C．learn D．write

 

6.	A．try B．have C．think D．wait

 

7.	A．place B．school C．way D．road

 

8.	A．buy B．go C．borrow D．get

 

9.	A．often B．always C．usually D．sometimes

 

10.	A．more B．much C．better D．well

 

Food is very important. Everyone needs to 46 well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is   47  . We begin to get knowledge even when we are very young. Small children are     48   in everything around them. They learn 49 while they are watching and listening. When they are getting older. they begin to 50 storybooks, science books, or anything they like.
When they find something new, they have to ask questions and 51 to find out the answers. What’s the best    52   to get knowledge? If we learn 53 ourselves, we will get the most knowledge. If we are     54   getting answers from others and don’t ask why, we will never learn more and understand    55     .
【小题1】 A. sleep   B. drink    C. cat
【小题2】 A. sport B. knowledge C. meat
【小题3】 A. interested B. interesting   C. good
【小题4】A. something B. nothing   C. anything
【小题5】A. write      B. learn       C. read
【小题6】 A. try    B. think   C. wait
【小题7】 A. place   B. way   C. road
【小题8】 A. with B. to   C. by
【小题9】 A. seldom B. always   C. sometimes
【小题10】 A. much   B. well C. better

单词填空（根据中文写出单词的适当形式，每空一词）。(每小题1分，共计15分)
1.Jane said that she_________________(更喜欢)sending emails to writing letters．
2.There was something wrong with his old MP4. Yesterday he had it_________________(修理).
3.Our English teacher is always_________________(精力充沛)，so we are interested his classes．
4.Do you have___________________(困难)understanding what he said?
5.He was too_______________(急躁的)to wait in a queue．
6.Stop __________________(争论)！It’s no use.
7.People all over the world love____________________(和平).
8.What are you __________________(搓揉) into your skin?
9.No one can _________________(允诺) you success. All you need to do is to work hard.
10.I’m sorry , sir, the shoes are not _____________________(可获得的) in your size..
11.Are there any ________________(不同) between living in a big city and living in the country?
12. Art will have a great __________________(影响)on our lives in the future.
13.He pays a lot of ___________________(注意) to his writing.
14. Could you please give me some ___________________(建议).
15. Lily is doing __________________(实验) in the laboratory now.

请根据句意从方框中选择合适的单词并用其适当形式填空，使句子通顺。

choose  come  twelve  it   success

1. Nobody came close to the door, so the door seemed to close by _________ .

2.Without the help of our teacher, we did the experiment ___________ .

3.We are all busy getting ready for the _________ exams these days.

4.The traffic stopped, and he had no ______ but to walk home.

5.I hope to see you at my ________ birthday party.

请根据句意从方框中选择合适的动词并用其适当时态填空，使句子通顺。

show  visit  save  prefer   wait

6. Please keep quiet. The doctors _________ the dying man in it .

7.---You were not in when I called you yesterday afternoon.

   ----Oh, I _________ for my uncle at the airport.

8.----She seems to know much about the exhibition.

   ----That’s  right .  She ________ it three times since she came here.

9.I wonder how to use the washing machine.

   That’s easy.  I ___________ you later.

10. My sister ________ red to black when she was young .