一、按要求完成下列句子
1. Nobody can answer the question. (改为同义句)
The question ____ ____ answered by anybody.
2. We should brush our teeth twice a day. (改为被动语态)
Our teeth should ____ ____ twice a day.
3. Can you take good care of the children? (改为被动语态)
____ the children ____ ____ good care of by you?
4. We must wash our hands before meals. (改为被动语态)
Our hands ____ ____ ____ before meals.
5. The classroom must be cleaned after school. (对画线部分提问)
____ ____ the classroom ____ ____?

一、1. can't be 2. be brushed 3. Can; be taken
4. must be washed 5. When must; be cleaned

1. When our parents become too old to take care of themselves one day, they ____ be looked after well by us.
A. should
B. shouldn't
C. may
D. may not

二、1. A

2. Thanks to the Internet, lots of information ____ online.
A. can be searched
B. can't be searched
C. can search
D. can't search

二、2. A

3. —What's the meaning of the activity “Let's save”?
—Paper shouldn't ____ in everyday life.
A. waste
B. wasted
C. be wasted
D. is wasted

二、3. C

4. —Bob, your room is so dirty. It must ____ every day.
—OK, Mom. I'll do it right now.
A. clean
B. be cleaned
C. is cleaned
D. was cleaned

二、4. B

5. My father has owned the car for six years and he gets it ____ twice a month.
A. wash
B. washed
C. washing
D. to wash
1 - 5

二、5. B