31.Please show me _________ to send an e-mail, John. It’s the first time for me to do it.

　A. howB. whatC. whenD. where

　答案：A　(选择C的同学要注意认真看题，这里的time不是时间，而是指第一次)

30.Don’t hurry. The bus won’t start ________ everybody gets on.

A. sinceB. asC. untilD. when

答案: C (选择D的同学要注意前面是否定.)

29.I’m going to look for another job ________ the company offers me more money.

A. afterB. unlessC. whenD. for

答案: B ( 选择其它三项的同学要注意语境, 这里是指除非公司给我更多工资,否则我就要找其它工作.)

28.I didn’t buy the dictionary yesterday _________ my aunt would give me one.

A. untilB. becauseC. ifD. before

答案: B (选择A的同学要注意语境)

27.He hasn’t heard from his friend __________ last month.

A. sinceB. by the end ofC. forD. until

答案: A (选择B的同学要注意B选项为过去完成时的时间;选择C的同学要注意, for+时间段; 选择D的同学要注意不是not…until 句型.until + 句子)

26.We can’t do it ________ your help.

A. withB. ofC. underD. without

答案: D. (选择C的同学要注意中文的干扰, 借助某人的帮助要用with,反之用without)

25.The postman shouted, “ Mr Green, here is a letter ________ you.”

A. to B. fromC. forD. of

答案: C ( 选择A的同学要注意to 表示动作的方向, for表示有从属关系或者利益关系)

24.Japan is ________ the east of China.

A. inB. toC. onD. at

答案: B ( in 表示在范围里的, on表示紧挨着的; to 表示在范围以外的)

23.________ is the population of the city?

A. How many B. What C. How many peopleD. How much

答案：B (在问到人口是多少时，其实是在说“人口数是什么”，因此不能用A，要注意排除中文的干扰。)

22.There are many trees on ________ side of the street.

A. eitherB. anyC. allD. both

答案：A (选择D的同学要注意side为单数。选择B的同学要注意：街道只有两边，因此不能用any)