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問題詳情：

A lot of animals travel from one place to another. We call this migration.

In Africa, large animals, like elephants and zebras, migrate to find food and water. They usually follow the same ways every year.

A lot of birds migrate to find food and better weather, too. They are usually birds that eat insects. They spend the summer in northern Europe, because there are lots of insects there. In the winter there aren't any insects, so the birds fly south to southern Europe and Africa.

Some insects migrate, too. In North America, millions of monarch butterflies fly south to spend the winter in Mexico, California and Florida, where it's warmer. They travel 50-65 km each day and they travel about 1, 125 km.

Some fish migrate to breed  (繁殖). Salmon (鮭魚) can swim over 20, 000 km in their life. They are born in rivers in Ireland, Scotland and other places in northern Europe. The young fish swim down the river to the sea and into the Atlantic Ocean. They live in the ocean until they are adults. Then they return to the river where they were born. They lay their eggs in the river and then they usually die. Salmon do this, because their eggs are safer in the river. Other fish can't eat them.

Arctic terns (北極燕鷗) travel the furthest when they migrate. They spend the summer in the Arctic, but when winter comes they fly to the Antarctic, because it's summer there. The next year they fly back to the Arctic again. In one year these small birds travel 36, 000km from one end of the earth to the other and back again. Nobody knows how they do it.

23. According to the passage, monarch butterflies in North America migrate to___________.

A. find insects               B. look for water           C. find better weather    D. produce young

24. Adult salmon swim back to the river because A. they won't be eaten by other big fish B. they want to lay eggs in a safer place C. they are getting ready to die there

D. they want to go where they grew up

25. Which of the following is true about animals' migration?

A. Elephants in Africa usually travel the same way each year.

B. Most birds fly to southern Europe and Africa in summer.

C. Some insects travel 1, 125 km each day.

D. Salmon swim 20, 000 km each year.

26. The example of Arctic terns in the last paragraph is used mainly to show _________.

A. the distance of migration                       B. the purpose of migration

C. the direction of migration                      D. the time of migration

【回答】

CBAA

文章大意：本文是一篇說明文，主要講述了很多動物為了食物、天氣、生產等原因而遷徙。

1.       細節理解題。根據第三段第二句 In North America, millions of monarch butterflies fly south to spend the winter in Mexico, California and Florida, where it's warmer.可知，他們是為了到比較暖的地方過冬。故*選C。

2.       細節理解題。根據第四段最後倒數第二句Salmon do this, because their eggs are safer in the river.可知，成年金圭魚回到出生地產卵是因為河水裡更安全。故*選 B

3.       細節理解題。根據第二段 In Africa, large animals, like elephants and zebras, migrate to find food and water. They usually follow the same ways every year. 可知，A項表述正確。故*選A。

4.       段落大意題。根據最後一段第一句 Arctic terns travel the furthest when they migrate. 以及第四句 In one year these small birds travel 36, 000km from one end of the earth to the other and back again可知，本段主要講了北極燕鷗的遷徙距離。故*為A。

知識點：說明文

題型：閱讀理解