Some people associate migration mainly with birds. Birds do travel vast distances, but mammals also migrate. An example is the caribou, reindeer that graze on the grassy slopes of northern Canada. When the weather turns cold, they travel south until spring. Their tracks are so well-worn that they are clearly visible from the air. Another migrating mammal is the Alaska fur seal. These seals breed only in the Pribilot Islands in the Bering Sea. The young are born in June and by September are strong enough to go with their mothers on a journey of over 3,000 miles. Together they swim down the Pacific Coast of North America. The females and young travel as far as southern California. The males do not journey so far. They swim only to the Gulf of Alaska. In the spring, males and females all return to the islands, and there the cycle begins again. Whales are among the greatest migrators of all. The humpback and blue whales migrate thousands of miles each year from the polar seas to the tropics. Whales eat huge quantities of plankton. These are most abundant in cold polar waters. In winter, the whales move to warm waters to breed and give birth to their young.

　　81. From the passage we can learn that ______

　　A. people migrate like animals

　　B. only birds migrate

　　C. the female fur seals migrate only to the Gulf of Alaska

　　D. not all mammals migrate

　　82. The phrase "An example" underlined in Paragraph 1 refers to an example of a ______

　　A. migratory mammal

　　B. place where animals migrate

　　C. migrating bird

　　D. person who associates migration with birds

　　83. All the mammals are mentioned as migrating ones EXCEPT ______

　　A. caribou B. fin whale

　　C. reindeer D. Alaska fur seal

　　84. Where can you see from the air the migration of the mammals?

　　A. In the Pribilot Islands. B. In the Bering Sea.

　　C. In southern California. D. In northern Canada.

　　85. Which of the following is NOT true?

　　A. Whales breed in winter.

　　B. Young whales are given birth in cold waters.

　　C. Alaska fur seals give birth to the young only in one area.

　　D. Alaska fur seals are born in warm weather.

　　86. Together ______ of Alaska fur seals swim down the Pacific Coast of North America.

　　A. mothers and the young

　　B. fathers and the young

　　C. parents and the young

　　D. seals and whales

　　87. Which of the following is NOT described in the passage?

　　A. Whales migrate to breed and give birth to their young.

　　B. Whale-watching in Boston in summer is attracting.

　　C. Seals breed in the north before migration.

　　D. Reindeer feed on grass.

　　88. Whales live on ______

　　A. tiny plants and animals in the sea

　　B. the grassy slopes of northern Canada

　　C. their young in cold winter

　　D. the abundant seafood in tropic waters

　　89. How many kinds of migrating mammals are mentioned in the passage?

　　A. Four. B. Three.

　　C. Two. D. One.

　　90. What is the best title of the passage?

　　A. Three Types of Whales

　　B. Birds Migration

　　C. Mammals Also Migrate

　　D. Several Kinds of Migration

　　KEYS：

　　81.D[分析] 推斷題型。

　　從文章前幾句得知：一些人認為有遷徙習性的主要是鳥類……但哺乳動物也“遷徙”：其中一個例子是……。另一個遷徙的例子是……。由此推斷出并不是所有的哺乳動物都遷徙;因此選項D是答案。本題也可用排除法做：選項A，B、C均是錯誤的，所以只有D是正確選項。

　　82.A[分析] 細節(jié)題型。

　　見上題分析，第二、三句提到哺乳動物也遷徙：其中—個例子是……。當然這個例子應(yīng)是指遷徙的哺乳動物了。所以選項A是答案。

　　83.B[分析] 細節(jié)題型。

　　選項A和C在第三句中提及：選項D在第六句中提及：因此本題答案應(yīng)為B。

　　84.D[分析] 細節(jié)題型。

　　見第三句、五句：An example is the caribou，reindeer that graze on the grassy slopes of northern Canada...Their tracks are so well-worn that they are clearly visible from the air.因此答案為D。

　　85.B[分析] 是非題型。

　　見文章最后一句：In winter，the whales move to warm waters to breed and give birth to their young.因此選項B為答案。

　　86.C[分析] 細節(jié)題型。

　　[注意本題容易選錯]從文章Another migrating mammal is the Alaska fur seal These seals breed only in the Pribilot Islands in the Bering Sea. The young are born in June and by September are strong enough to go with their mothers on a journey of over 3,000 miles.Together they swim down the Pacific Coast of North America.The females and young travel as far as southern California.The males do not journey so far，中的劃線部分可知，The females and young Alaska fur seal會從the Bering Sea(白令海——北太平洋的一部分)swim down the Pacific Coast of North America直到 southern California;而 The males也會從白令海南下(因為These seals breed only in the Pribilot Islands in the Bering Sea.)，只不過他們沒有the females and young走的遠罷了。因此選項C為答案。

　　87.B[分析] 是非題型�？荚嚲W(wǎng)

　　選項A(見文章最后一句)、選項C(見上題)和選項D(見第三句)的內(nèi)容在文章中均有提及，所以選項B是答案。

　　88.A[分析] 細節(jié)題型。

　　見文章倒數(shù)第三、四句：Whales eat huge quantities of plankton(浮游生物)。 These are most abundant in cold polar waters，所以選項A為答案。也可用排除法：選項B指的是reindeer的習性，選項C文中未提及鯨以幼仔為生，選項 D指的是tropic water，與 polar water相反：所以只有選項A正確。

　　89.B[分析] 細節(jié)題型。

　　文章提及reindeer(第三句)，the Alaska fur seal(第六句)和Whales(倒數(shù)第五句)所以選項B為答案。

　　90.C[分析] 主旨題型。

　　閱讀全文，本文主要講的是一些遷徙的哺乳動物，未仔細談及幾種類型的遷徙;因此C為答案。