29. -Would you like to come to the dinner party here on Saturday?

-Thank you. I’d love to ______ I’ll be ont of town at the weekend.

A. because　　 B. and　　　 C. so　　　 D. but

答：D。I’d love to, but...说明不能去的理由，是一种婉转拒绝的方法。

28. Excuse me for breaking in,_______ I have some news for you.

A. so　　　 B. and　　　 C. but　　　 D. yet

答：C。Excuse me...but...为常用句式。

27. -________Was his father very strict with him when he was at school?

-Yes. He had never praised him _____ he became one of the top students in his grade.

A. alter　　 B. unless　 C. until　　 D. when

答；C。若选unless应用虚拟语气。

26. He was about to tell me the secret ______ someone patted him on the shoulder.

A. as　　　 B. until　　 C. while　　 D. when

答：D。when　 就在那时

25. Just after putting away the dishes, ________.

A. the doorbell rang loud　　　

B. Nancy heard the doorbell ring

C. someone knocked at the door　

D. the doorbell was rung

答：B。最快的解题思路就是掌握：分词的逻辑主语应和句子的主语一致。

24. _______the poem a second time, the meaning will become clearer to you.

A. Your having read　　　 B. While reading

C. If reading　　　　　　 D. When you read

答：D。分词做状语时，分词的逻辑主语应与句子的主语一致，故排除B、C两项。A项为带逻辑主语的动名词结构，不能做状语。

23. _________ you have seen both fighters, ________will win?

A. Since, do you think who　

B. As, who you think

C. When, whoever　

D. Since, who do you think

答：D。since既然，do you think为插入语。

22. ________he comes, I’ll tell him the news.

A. Directly　 　B. Suddenly　

C. Quickly　 　　D. At once

　　　　　 directly

　　　　　 immediately

答：A。 　the moment　　　 =as soon as

　　　　　 the second

　　　　　 the minute

　　　　　 the instant

21. You should make it a rule to leave things ________ you can find them again.

A. when　　 B. where　　 C. then　　 D. there

答：B。where引导的是地点状语从句。

20. _______you’ve got a chance, you might as well make full use of it.

A. Now that　 　B. After

C. Although　 　D. As soon as

答：A。nowthat＝since　 既然