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大学英语四级词汇集中训练2_第2页

来源：考试网 2011-10-29 【大中小】

　17.When a spacecraft travels, one of the major problems is reentry into the Earth’s _______.

　　A. surface

　　B.atmosphere

　　C.attitude

　　D.bent

　　18.This river forms a natural _______ between China and Korea.

　　A. boundary

　　B.string

　　C.spot

　　D.zone

　　19.She is already 16years old. But she _______as if she were still a little girl.

　　A. believes

　　B.absorbs

　　C.accrses

　　D.behaves

　　20.We are _______ at the rapid progress Mark has made in this semester.

　　A. distinguished

　　B.annoyed

　　C.astonished

　　D.scored

　　答案:

　　11.A 12.A 13.B 14.D 15.A

　　16.B 17.D 18.D 19.A 20.C

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