8. The climate of Shanghai is better than ____ of Nanjing.

　　 A. that　　　　 B. it　　　　　　　 C. which　　　　　　 D. what

7. We think ____ our duty to pay taxes to our government.

　　 A. that　　　　 B. this　　　　 C. its　　　　　 D. it

6. ____ will do you good to do some exercise every morning.

　　 A. It　　　　　　　 B. There　　　　　　 C. Those　　　　　　 D. You

5. The color of my coat is different from ____ of yours.

　　 A. this　　　　 B. that　　　　 C. it　　　　　　　 D. one

4. ---- Have you ever seen a whale alive?　　　 ---- Yes, I’ve seen ____.

　　 A. that 　　　　　　 B. it　　　　　　　 C. such　　　　 D. one

3. ____ was Jane that I saw in the library this morning.

　　 A. It　　　　　　　 B. He　　　　　 C. She　　　　　 D. That

2. ---- Who’s that?　　　　　　 ---- ____ Professor Li.

　　 A. That’s　　　 　 B. It’s　　　　　　 C. He’s　　　　　　 D. This’s

1. My bike is missing. I can’t find ____ anywhere.

　　 A. one　　　　　 B. ones　　　　 C. it　 　　　　　　 D. that

1． It is +adj．(+for sb．／sth．) + to do sth． 用于此句型的形容词有：easy， hard， difficult，possible，　 important， impossible， necessary， good， bad， exciting，　 interesting， surprising等。如： It is necessary to change your job． It was very hard for them to walk such a long way in　 the snow． 2． It is +n．(+for sb．／sth．) + to do sth． 用于此句型的名词有： pity, shame, pleasure, one’s duty, one’s　 job, fun, joy, good manners, bad manners等。如： It is a pity for you to have missed such a wonderful　 play． It is bad manners for the young to take up the seats　 for the old． 3． It is +adj．+of sb．+to do sth．　 此句型中的形容词主要描述某人的品德、特征。能用于该句型的形容词有：　 kind, nice, wise,　 silly, polite, impolite, friendly, foolish, clever等。如： How silly it was of you to give up such a good　 chance！ It is friendly of the family to try to make me feel　 at home in their house． 4． It is +adj．(+n．)+doing sth．　 此句型中的形容词和名词常见的有：no／little use, no／much good,　 useless等。如： It’s no use crying over spilt milk． 5．It takes sb．+一段时间+to do sth． 表示“做某事花费某人多长时间”。如： It took us half an hour to ride to the town by the　 sea． 6．It is +及物动词的过去分词+that从句　 此句型中常见的及物动词的过去分词有：said, told, known, reported,　 recorded, thought, believed, considered等。如： It is reported that the Russian President will visit　 China next week． 7．It +不及物动词+that从句　 此句型中不及物动词常见的有：seem， happen， appear， matter等。如： It seems that there will be a heavy snow tomorrow． It happened that I met my good friends in the museum　 yesterday． 8．强调句型：It is+被强调部分+that／who从句 在使用强调句型时要注意，指人时可以用who或that，其它情况一律用that。如： It was under the bed that my brother hid the ball　 this morning． It is Mr Bell who／that often comes and looks after　 the old man． 9．It is／has been+一段时间+since从句。如： It is ／has been three years since we saw each other　 last． 10．It is (high) time that sb． did sth． 该句型表示“某人现在该做某事了”，从句常用过去时(虚拟语气) 说明现在应该做的事情。如： It’s six o’clock．It is high time that we went home　now．

练习.It的用法

25. I was really anxious about you . You ____home without a word.(01高考题)

A. mustn't leave　　　　　　　　　　　B. shouldn't have left

C. couldn't have left　　　　　　　　D. needn't leave

　1-5 BDABD　 6-10 BDCDC　 11-15 CBABD　 16-20 CDADA　　 21-25 CAACB

*2006全国各省市高考试卷中的情态动词试题

1　　　　 A(全国卷I)24. There's no light on -- they______ be at home.

　　 A. can't　　　　　 B. mustn't　　　　 C. needn't 　　　　D. shouldn't

2　　　　 (全国卷2)10. We hope that as many people as-possible _______ join us for the picnic tomorrow.

　　 A. need B. must C. should　 　 D. can

3　　　　 (北京卷)25. -- What’s the name?

--Khulaifi. _______ I spell that for you?

　　 A. Shall　　　　 B. Would　　 　　　 C. Can　 D. Might

4　　　　 (上海春)26.　 You know he is not going to let us leave early if we ___ get the work done.

　　 A. can't 　　　　　 B. may not 　　　　 C. shouldn't 　　　　　 D. mustn't

5　　　　 (天津卷)11. We 　　　　have proved great adventurers, but we have done the greatest march ever made in the past ten years.

　　 A. needn’t　　　 B. may not　　　　 C. shouldn’t　　 D. mustn’t

6　　　　 (四川卷)32. ---Is Jack on duty today?

　　 ---It ________ be him. It's his turn tomorrow.

　　 A. mustn't　　　　 B. won't　　　　　　 C. can't　　　　　　 D. needn't

7　　　　 (江西卷)24．The weather turned out to be fine yesterday．I _______ the trouble to carry my umbrella with me．

　　 A．should have taken　　　　　　　　 B．could have taken　

C．needn't have taken 　　　　　　　 　D，mustn't have taken

8　　　　 (陕西卷)19.As you worked late yesterday, you _________ have come this morning.

　　 A. mayn’t　　　　　 B. can’t　　　 C. mustn’t　　　　 D. needn’t　

9　　　　 (福建卷)27.If it were not for the fact that she _______ sing, I would invite her to the party.

　　 A. couldn’t　　　　 B. shouldn’t　　 C. can’t　　　　 D. might not

10　　 (湖北卷)31. __________ fired, your health care and other benefits will not be immediately cut off.

　　 A. Would you be　　 B. Should you be　 C. Could you be　　　 D. Might you be

11　　 (湖南卷)32.Some aspects of a pilot’s job ________ be boring, and pilots often _______ work at inconvenient hours.

　　 A. can; have to　　　 B. may; can　　 C. have to; may　　　 D. ought to; must

12　　 (江苏卷)21. --- I think I’ll give Bob a ring.

　　 --- You _______. You haven’t been in touch with him for ages.

　　 A. will B. may　 C. have to　 D. should

13　　 (广东卷)22. -- Must he come to sign this paper himself?

　　 -- Yes, he 　　　　　　.

　　 A. need　　　　 B. must　　 C. may　　　 D. will

14　　 (浙江卷)19. --- Could I have a word with you, mum?

　 --- Oh dear, if you ________.

　　 A. can　 B. must C. may　 D. should

15　　 (山东卷)30. --May I smoke here ?

　　　　　　　 --If you ____, choose a seat in the smoking section.

　　 A. should　 B. could　 C. may　 D. must

1-10 ADCAB CCDCB 11-15 ADBBD