B
What weighs 3500 pounds(1600kg)and lived 60 million years ago?Are you thinking of
dinosaurs?Guess again!You don,t have to go to a museum to see these creatures．They are alive
and swimming in the warm coastal waters of Florida．
Manatees(海牛)have lived a peaceful existence in the warm waters  of  Florida  for  60
million years．However，they are now an endangered species．This means that if humans don,t do
something to save them，they will soon go the way of dinosaurs．
Humans have made life very difficult for manatees．One big danger that humans have
introduced is the speedboat．Because manatees are mammals．they need to come to the surface to breathe about every 5 to 6 minutes．This means that they are in constant danger of being caught in the propellers(螺旋桨)of speedboats．And boating aceidents are the greatest cause of death for them．
Manatees are in extra danger when they are in their sleeping or“torpor”state．They still
have to come to the surface for the air，but sometimes they are too sleepy to avoid the danger of approaching boats．
Another danger for manatees is the pollution that humans produce．Due to human pollution，
a deadly plant called red tide had increased greatly in the Gulf of Mexico．The plant，or algae，
t11riVes(繁茂)on pollution．It wiped out nearly 20 percent of the total manatee population on
earth．
Humans can help to save manatees。The government has established boating speed limits to
give the manatees．a chance to escape approaching speedlsoats．Everyone can help by cutting
down on waste and pollution to protect the waters for the manatees．
One famous singer，Jimmy Buffet，has helped save the manatees．He co-founded the Save the Manatee Club(SMC)．SMC had begun an adoption(收养)program for the manatees．For a fee，sponsors(资助者)can name a manatee．Donations are used to help protect the manatees and their habitat．
45．The manatee is the kind of animal that___________．
A．1ikes living in the cold waters of Florida      B．will die out if not protected in time
C．call dive in the deep sea for hours             D．is the biggest living animal on earth
46．Why is it dangerous for manatees to be in a torpor state?
A．Because they come to the snlface to breathe，and that is when they are hunted．
B．Because they eat deadly algae，and this makes them too sick to avoid danger．
C．Because they live in groups and therefore they are easily hurt by passing boats．
D．Because they are sleepy when they surface，so they can,t avoid approaching boats．
47．The death of the manatees is largely due to__________．
A．human hunting                       B．human pollution
C．speedboat accidents                  D．deadly plants
48．To help protect manatees，people should_________．
A．never go speed boating in their living habitat
B．keep the waters of Florida free from pollution
C．have manatess named by sponsors without a fee
D．wake manatees up from their torpor state

                              A

When you think of success, you think of relative achievements in your own world. Each element of your world is important to you, and there is no need to compare with others. You cannot affect the success of others; you can affect your own success.

Success is very much achievable to everybody. Believe that and you have taken the first step. If you do not believe in yourself, then building self-esteem is your first task. However, believing in your ability to achieve whatever you want to succeed in is very important if you are not to be held back by self-doubt throughout your journey to success.

There are many things that will affect your ability to succeed, and it is best to focus on those under your immediate control. Once you do that, then the characteristics you develop can be applied to becoming successful in a range of activities.

What is important to you is that, as you start to reach milestones in your ambitions, you should appreciate your own achievements. Appreciating yourself will strengthen your self-confidence and your determination to succeed.

Some of the key characteristics you will find in those who are successful are perseverance, prepared to research, plan, work hard and practice a lot even when things do not seem to be going well, and an ability to recover and learn from setbacks. At the beginning of whatever you are trying to succeed in, a strong vision of your future, planning, and setting yourself achievable tar gets can all play an important role.

All these qualities, skills and characteristics can be learned and developed. But it is up to you to get things started. Those who do not start travel nowhere. For others, life can be a continuous journey of fulfillment.

1.56. According to the passage, if you want to achieve success, what should you do first?

2.57. Why should you appreciate your own achievements according to the passage?

3.58. The underlined word“setbacks”（in paragraph 5）probably means ________.

4.59. What can we learn from the last paragraph?

B

What weighs 3500 pounds(1600kg)and lived 60 million years ago?Are you thinking of

dinosaurs?Guess again!You don,t have to go to a museum to see these creatures．They are alive

and swimming in the warm coastal waters of Florida．

Manatees(海牛)have lived a peaceful existence in the warm waters  of  Florida  for  60

million years．However，they are now an endangered species．This means that if humans don,t do

something to save them，they will soon go the way of dinosaurs．

Humans have made life very difficult for manatees．One big danger that humans have

introduced is the speedboat．Because manatees are mammals．they need to come to the surface to breathe about every 5 to 6 minutes．This means that they are in constant danger of being caught in the propellers(螺旋桨)of speedboats．And boating aceidents are the greatest cause of death for them．

Manatees are in extra danger when they are in their sleeping or“torpor”state．They still

have to come to the surface for the air，but sometimes they are too sleepy to avoid the danger of approaching boats．

Another danger for manatees is the pollution that humans produce．Due to human pollution，

a deadly plant called red tide had increased greatly in the Gulf of Mexico．The plant，or algae，

t11riVes(繁茂)on pollution．It wiped out nearly 20 percent of the total manatee population on

earth．

Humans can help to save manatees。The government has established boating speed limits to

give the manatees．a chance to escape approaching speedlsoats．Everyone can help by cutting

down on waste and pollution to protect the waters for the manatees．

One famous singer，Jimmy Buffet，has helped save the manatees．He co-founded the Save the Manatee Club(SMC)．SMC had begun an adoption(收养)program for the manatees．For a fee，sponsors(资助者)can name a manatee．Donations are used to help protect the manatees and their habitat．

45．The manatee is the kind of animal that___________．

A．1ikes living in the cold waters of Florida      B．will die out if not protected in time

C．call dive in the deep sea for hours             D．is the biggest living animal on earth

46．Why is it dangerous for manatees to be in a torpor state?

A．Because they come to the snlface to breathe，and that is when they are hunted．

B．Because they eat deadly algae，and this makes them too sick to avoid danger．

C．Because they live in groups and therefore they are easily hurt by passing boats．

D．Because they are sleepy when they surface，so they can,t avoid approaching boats．

47．The death of the manatees is largely due to__________．

A．human hunting                       B．human pollution

C．speedboat accidents                  D．deadly plants

48．To help protect manatees，people should_________．

A．never go speed boating in their living habitat

B．keep the waters of Florida free from pollution

C．have manatess named by sponsors without a fee

D．wake manatees up from their torpor state

B

    What weighs 3500 pounds(1600kg)and lived 60 million years ago?Are you thinking of

dinosaurs?Guess again!You don,t have to go to a museum to see these creatures．They are alive

and swimming in the warm coastal waters of Florida．

     Manatees(海牛)have lived a peaceful existence in the warm waters  of  Florida  for  60

million years．However，they are now an endangered species．This means that if humans don,t do

something to save them，they will soon go the way of dinosaurs．

     Humans have made life very difficult for manatees．One big danger that humans have

introduced is the speedboat．Because manatees are mammals．they need to come to the surface to breathe about every 5 to 6 minutes．This means that they are in constant danger of being caught in the propellers(螺旋桨)of speedboats．And boating aceidents are the greatest cause of death for them．

    Manatees are in extra danger when they are in their sleeping or“torpor”state．They still

have to come to the surface for the air，but sometimes they are too sleepy to avoid the danger of approaching boats．

    Another danger for manatees is the pollution that humans produce．Due to human pollution，

a deadly plant called red tide had increased greatly in the Gulf of Mexico．The plant，or algae，

t11riVes(繁茂)on pollution．It wiped out nearly 20 percent of the total manatee population on

earth．

    Humans can help to save manatees。The government has established boating speed limits to

 give the manatees．a chance to escape approaching speedlsoats．Everyone can help by cutting

 down on waste and pollution to protect the waters for the manatees．

    One famous singer，Jimmy Buffet，has helped save the manatees．He co-founded the Save the Manatee Club(SMC)．SMC had begun an adoption(收养)program for the manatees．For a fee，sponsors(资助者)can name a manatee．Donations are used to help protect the manatees and their habitat．

45．The manatee is the kind of animal that___________．

    A．1ikes living in the cold waters of Florida      B．will die out if not protected in time

    C．call dive in the deep sea for hours             D．is the biggest living animal on earth

 46．Why is it dangerous for manatees to be in a torpor state?

    A．Because they come to the snlface to breathe，and that is when they are hunted．

    B．Because they eat deadly algae，and this makes them too sick to avoid danger．

    C．Because they live in groups and therefore they are easily hurt by passing boats．

    D．Because they are sleepy when they surface，so they can,t avoid approaching boats．

47．The death of the manatees is largely due to__________．

  A．human hunting                       B．human pollution

  C．speedboat accidents                   D．deadly plants

 48．To help protect manatees，people should_________．

    A．never go speed boating in their living habitat

    B．keep the waters of Florida free from pollution

    C．have manatess named by sponsors without a fee

    D．wake manatees up from their torpor state

C

Why do men die earlier than women? The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.

The largest study of the effects of ageing on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.

“We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age,” said the head of the study, David Goldspink of Liverpool John Moores University in the UK.

“Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men,” said Goldspink. “This is part of the ageing process.”

What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.

“This gender difference might just explain why women live longer than men,” said Goldspink. They studied more than 250 healthy men and women between the ages of 18 and 80, focusing on healthy persons to remove the confusing influence of disease. “The team has yet to find why ageing takes a greater loss on the male heart,” said Goldspink.

The good news is that men can improve the health of their heart with regular exercise. Goldspink stressed that women also need regular exercise to prevent their leg muscles becoming smaller and weaker as they age.

69. The underlined word “longevity” in the second paragraph probably refers to “________”.

A. health          B. long life         C. ageing         D. effect

70. The text mainly talks about ________.

A. men’s heart cells                    B. women’s ageing process

C. the gender difference                D. hearts and long life

71. According to the text, the UK scientists have known that ________.

A. women have more cells than men when they are born

B. women can replace the cells that enable the heart to beat

C. the female heart loses few of the cells with age

D. women never lose their pumping power with age

72. If you want to live longer, you should ________.

A. enable your heart to beat much faster

B. find out the reason for ageing

C. exercise regularly to keep your heart healthy

D. prevent your cells from being lost