It’s strange that birds know when to ______ and find their way back home.

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问题 It’s strange that birds know when to ______ and find their way back home.

选项 A、immigrate
B、migrate
C、emigrate
D、immigrant

答案B

解析 近义词辨析。前三个选项均为动词,都含有“移居”的意思。immigrate意为“移居入境”,指从外国移来,如:Britain immigrated many colonists to the New World.(英国把大量殖民者移居到新大陆。) migrate意为“移居,迁移”,指从一地移住另一地,尤指鸟类的迁徙,如:Some birds migrate to find warmer weather.(有些鸟迁徙以寻找更温暖的气候。)emigrate意为“移居外国”,指离开本国永远移居外国,如:The family wanted to emigrate to Canada.(这一家想移民到加拿大。)immigrant是名词,意为“移民,侨民”,如: Immigrants can’t work in the United States without a permit.(在美国如果没有许可证,移民就不能工作。)本题所指的是鸟类的迁徙,故应选B)。
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