1663] At present pupils are kept _____ a lot of exercises not only in school but also at home.

[译文] 现在学生们被忙于做许多练习题，无论在学校还是在家里了。

　 A. on doing 　 B. busy doing

　 C. to do 　 D. done

[答案及简析] B。 keep sb. busy doing sth. 使某人忙着干某事。

1662] Her new dress cost her _____ $8,900.

[译文] 她的新衣服花了她多达8,900美元。

　 A. as much as 　 B. as high as

　 C. so much as 　 D. as expensive as

[答案及简析] A。 as much as 多达。

1661] I’ll reply _____ this letter as soon as possible.

[译文] 我将尽快给这封信回信。

　 A. on 　 B. to

　 C. for 　 D. /

[答案及简析] B。 reply to回答。

1660] Such a small child as he _____ a ticket.

[译文] 像他那样的小孩不需要票。

　 A. mustn’t 　 B. hasn’t

　 C. doesn’t need 　 D. needn’t

[答案及简析] C。 need 这里是实意动词，表示必要。

1659] Anyone _____ this opinion may speak out.

[译文] 反对这个意见的人可以说出来。

　 A. that against 　 B. which is against

　 C. that is against 　 D. who against

[答案及简析] C。 定语从句代替人用who 或that，但D中没有谓语动词。

1658] There is something more _____ to stop pollution, but hunmans won’t pay more attention.

[译文] 应该采取更多的措施制止污染，但是人们不太重视。

　 A. to be done 　 B. to do

　 C. being done 　 D. doing

[答案及简析] A。 do something to do sth. 采取某些措施做...。

1657] Once he listens to music, he sings a song _____ it.

[译文] 只要他在听音乐，他就随着音乐唱歌。

　 A. with 　 B. to

　 C. at 　 D. by

[答案及简析] B。 do sth. to the music 伴随音乐做某事。

1656] -----where are you staying all day long? 　　-----_______.

[译文] --你一整天呆在那儿的？　　--在史密斯家里。

　 A. At Smith’s 　 B. At Smiths’

　 C. At the Smith’s 　 D. At the Smiths’

[答案及简析] D。 at the Smiths’ 表示在某人家里。

1655] Both _____ and _____ laughter do harm to your health.

[译文] 突然大哭或突然大笑都对健康有害处。

　 A. burst into tears; burst into 　 B. to furst into tear; to burst into

　 C. bursting into tears; brusting into 　 D. tear; /

[答案及简析] C。 不定式短语或动名词短语都可以作主语，但不定式的这个短语有错误。

1654] Only______ that.

[译文] 只有医生能做那件事。

　 A. can a doctor do 　 B. a doctor can do

　 C. can do a doctor 　 D. can a doctor does

[答案及简析] A。 only 在句首，要部分倒装。