1. Don't forget _________ the letter.

A. to send      B. send      C. sending      D. being sent

2. The chair looks very old, but in fact it is very comfortable to _________.

A. sit          B. sit on     C. be sat        D. be sat on

3. Is ______ necessary to return the book tomorrow?

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

4. I'm afraid they would not allow him ________ here.

A. to smoke     B. smoking   C. smokes      D. smoke

5. Mother told me ________ the water before I drank it.

A. boiling       B. boiled    C. boil          D. to boil

6. On my way home, I stopped _______ some food.

A. buy         B. to buy     C. buying       D. bought

7. John was made _______ the car for a week as a punishment.

A. to wash      B. washing   C. wash        D. to be washing

8. The sitting-room needs _______, but it'll have to wait until Saturday.

A. be cleaning    B. to be cleaned    C. clean      D. being cleaned

9. The first thing I want to do is __________.

A. visit to him   B. to visit him    C. visiting him    D. visited him

10. Li Yang advised me _________ too much, otherwise I would have been drunk.

A. not to drink    B. to drink    C. not drinking    D. drinking

[參考答案]

1. A.    forget to do sth .  忘記去做某事。forget doing sth .  忘記做過(guò)某事。

2. B.    sit on the chair, 其中on不能少。

3. C.    it為形式主語(yǔ)。

4. A.    allow sb to do

5. D.    tell sb, to do

6. B.    stop to do  停下去做另一件事。stop doing  停止做某事。

7. A.    make sb do  在被動(dòng)語(yǔ)態(tài)中為be made to do .

8. B.    need to be done與need doing皆為“需要被做”之意。

9. B.    不定式結(jié)構(gòu)作表語(yǔ)。

10. A.   不定式的否定式：advise sb not to do