21.The suspect ______ that he had not been in the neighbourhood at the time of the crime.

A) advocated

B) alleged

C) addressed

D) announced

22.Although the colonists ______ to some extent with the native Americans , the Indians' influence on American culture and language was not extensive.

A) migrated

B) matched

C) mingled

D) melted

23.E-mail is a convenient, highly democratic informal medium for conveying messages that _______ well to human needs.

A) adheres

B) reflects

C) conforms

D) satisfies

24.The wings of the bird still ______ after it had been shot down.

A) slapped

B) scratched

C) flapped

D) fluctuated

25.The disagreement over trade restrictions could seriously ?______ relations between the two countries.

A) tumble

B) jeopardize

C) manipulate

D) intimidate

21.B 参考译文：犯罪嫌疑人声称案发时他不在附近。

A) advocate 提倡

B) allege 声称

C) address 发表演讲

D) announce 宣布

22.C 参考译文：虽然殖民者与美洲土著人在某种程度上互相融合，但是印第安人对美国文化和语言的影响并不广泛。

A) migrate 迁徙

B) match 使...匹配

C) mingle 混杂

D) melt 溶化

23.C 参考译文：电子邮件是一种便捷而又高度民主的非正式媒介，它传递信息，符合人类的需要。

A) adhere 遵守

B) reflect 反映

C) conform 遵循

D) satisfy 满足

24.C 参考译文：鸟儿被打下来后仍然拍打着翅膀。

A) slap 掴耳光

B) scratch 抓，搔

C) flap 振动翅膀

D) fluctuate 波动

25.B 参考译文：贸易限制方面存在的意见分歧会严重危及两国的关系。

A) tumble 跌倒

B) jeopardize 危害

C) manipulate 控制

D) intimidate 威吓