people in the 19th century were eager to eat sugar
if shipwrecked sailors had drunk fresh water, things would have been even worse
one or more scientists have been hired to cheat in regard to sugar
scientists can do nothing without the money subsidized secretly
第1题：
B
The world is not only hungry，it is also thirsty for water． this may seem strange to you，since nearly 75% of the earth is covered with water． But about 97% of this water is sea water．Man can only drink and use the other 3% fresh water that comes from rivers，lakes，under-ground and other places． And we cannot even use all of that，because some of this fresh water has been made dirty．
At the moment，this small amount(数量) of fresh water is still enough for us． However，our need for water is getting greater and greater． Only if we take steps to solve this problem now，we can get away from a serious world water shortage later on． The people of the world cannot have an enjoyable life without enough clean water．
On one hand we should stop wasting this little water of ours，on the other hand we should find ways to reuse it，but this has not been done widely．
Today，in most large cities，water is used only once and it then returns to the sea or runs into underground places．lf we can make it clean again，it can be used once more just as if it were fresh from a spring．
But even if large cities reuse its water，we still would not have enough in the future． Where．could we turn to next for water? To the ocean! How can we do to make use of this great a-mount of sea water? We can take the salt from the water to make it fresh．
So if we take all these steps，we'll be in no danger of drying up!
( )26． Why does the writer say that the world is thirsty for water?
A． The amount of fresh water is really very small．
B． The people of the world waste too much water．
C． The people of the world have to drink a lot of water every day．
D． There are too many people in the world needing water．
第2题：
C
“Old wives tales” are beliefs passed down from one generation to another, For Example, most of us remember our parents’ telling us to eat more of certain foods or not to do certain things. Is there any truth in these teachings? Some of them agree with present medical thinking, but others have not passed the test of time.
Did your mother ever tell you to eat your carrots because they are good for your eyes? Scientists now report that eating carrots can help prevent a serious eye disease called macular degeneration. Eating just one carrot a day can reduce the possibility of getting this disease by 40%. Garlic (蒜) is good for you, too. It can kill the type of virus that causes colds.
Unfortunately, not all of Mom’ s advice passed the test of medical studies, For example, generations of children have been told not to go swimming within an hour after eating. But research suggests that there is no danger in doing so. Do sweets cause tooth problems? Well, yes and no. Sticky sweets made with grains tend to cause more problems than sweets made with simple sugars.
Even though science can tell us that some of our traditional beliefs don’t hold water, there is still a lot of truth in the old wives’ tales. After all, much of this knowledge has been accumulated (积累) from thousands of years of experience in family health care. We should respect this body of knowledge even as we search for clear scientific support to prove it true or false.
48. Which of the following is TRUE according to the test?
A. Eating garlic is good for our eyes.
B. Sticky sweets are damaging to our teeth.
C. Swimming after a meal is dangerous.
D. Carrots prevent people from catching colds.
第3题：
A.Had there been
B.If there was
C.Were there to be
D.If there would have been
第4题：
If we had a sample in hand, we () to negotiate business with our end-users now.
A、would be able
B、should have
C、had been able
D、should have been able
第5题：
A、is
B、can be
C、are
D、have been
第6题：
More students than one ______ there.
A. has been
B. have been
C. had been
D. would have been
第7题：
A.will setup
B.have set up
C.would have set up
D.had set up
第8题：
The rice ______ if you had been more careful.
A. would not be burning
B. would not burn
C. would not have been burnt
D. would not burnt
第9题：
A、it not have been
B、is not been
C、had it not been
D、has not been
第10题：
If only it ()so cold, perhaps I, too, ()more initiative.
A、had been,have shown
B、have been,would show
C、had’t been,cound't have shown
D、had't been,could have shown