Air to us is _____ water to fish.
    A.what         B.that            C.which           D.of which

Do you know Australia? Australia is the largest island in the world. It is a little smaller than China. It is in the south of the earth. Australia is big, but its population is not large. The population of Australia is nearly as large as that of Shanghai.

   The government has made enough laws to fight pollution. The cities in Australia have got little air or water pollution. The sky is blue and the water is clean. You can clearly see fish swimming in the rivers. Plants grow very well.

   Last month we visited Perth, the biggest city in Western Australia, and went to a wild flowers’ exhibition. There we saw a large number of wild flowers we had never seen before. We had a wonderful time. Perth is famous for its beautiful wild flowers. In spring every year Perth has the wild flowers’ exhibition. After visiting Perth, we spent the day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves. Suddenly we heard bells ringing at the top of the hill. What we saw made us pick up all our things and run back to the car as quick as we could. There were about three hundred sheep coming towards us down the path.

   Australia is famous for its sheep and kangaroos(袋鼠). After a short drive from any town, you will find yourself in the middle of white sheep. Sheep, sheep, everywhere are sheep.

Australia is __________.

A.the largest country in the world   B. as large as Shanghai

C. not as large as China              D. the largest island in the north of the earth

The government had made _________.

A. not enough laws to fight pollution

B. so many laws that it can fight pollution

C. enough laws that it can hardly fight pollution

D. enough laws because the pollution is very serious

Which of the following is NOT true?

A. Perth is famous for its beautiful wild flowers

B. Perth is bigger than any other city in Western Australia

C. Perth lies in the west of Australia

D. No other city is larger than Perth in Australia

阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项．

　　With their shiny, grey bodies, dolphins（海豚）appear to be large fish．____1____, they are really warm-blooded mammals. Although they can stay under the water for up to 15 minutes ____2____, the dolphins must come up to breathe air through a hole on top of their heads.

　　Dolphins are social animals. Many of them even ____3____ around humans. In addition to being playful; they are helpful to men. For example ____4____ 400 B.C. the Great poet Arion was saved from ___5____ by a dolphin. From then until now, dolphins have been helping swimmers, ____6__ in trouble. Swimmers, however ,are not ___7____ humans they help. In some parts of the world, they help men ____8____ fish.

　　Dolphins are very clever. Its brain is even larger than a human's. Therefore, some people think a dolphin ____9__ smarter than a man, but ____10___, brain size is not the only measure of cleverness. Besides, measuring dolphin's cleverness in other ways is not possible ___11____ men cannot talk with them. But we can almost ____12____ that dolphins can talk with each other. They make different ____13____ which seem to be at least a form of language. Up to now men ____14___ able to find out how dolphins are talking. So no one really knows what they are thinking. If we could talk with them, perhaps they could teach us to be ___15____ they seem to be.

阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项．

　　With their shiny, grey bodies, dolphins（海豚）appear to be large fish．____1____, they are really warm-blooded mammals. Although they can stay under the water for up to 15 minutes ____2____, the dolphins must come up to breathe air through a hole on top of their heads.

　　Dolphins are social animals. Many of them even ____3____ around humans. In addition to being playful; they are helpful to men. For example ____4____ 400 B.C. the Great poet Arion was saved from ___5____ by a dolphin. From then until now, dolphins have been helping swimmers, ____6__ in trouble. Swimmers, however ,are not ___7____ humans they help. In some parts of the world, they help men ____8____ fish.

　　Dolphins are very clever. Its brain is even larger than a human's. Therefore, some people think a dolphin ____9__ smarter than a man, but ____10___, brain size is not the only measure of cleverness. Besides, measuring dolphin's cleverness in other ways is not possible ___11____ men cannot talk with them. But we can almost ____12____ that dolphins can talk with each other. They make different ____13____ which seem to be at least a form of language. Up to now men ____14___ able to find out how dolphins are talking. So no one really knows what they are thinking. If we could talk with them, perhaps they could teach us to be ___15____ they seem to be.