—Must they clean the classroom now?

—No, they ________

1. A.
   can't
2. B.
   needn't
3. C.
   don't
4. D.
   mustn't

按要求完成下面各句。每空一词。

1.I’m very pround of my parents. (改成同义句)

I ________ _________ in my parents very much.

2. I used to exercise every morning. (改为一般疑问句)

________ you _________ to exercise every morning?

3.We must keep clean the classroom every day. (改为被动语态)

The classroom must _________ __________ clean by us every day.

4. We allow sitting here.(改为否定句)

We __________  __________ sitting here.

5.They hardly ever go to movies.（改成反意疑问句）

They hardly ever go to movies,_________ _________？

— Must they clean and tidy the classroom now?

                  — No, they      . It       after school in the afternoon.

                  A. mustn’t; must clean                                   B. needn’t; must clean

                  C. mustn’t; need be cleaned                         D. don’t have to; can be cleaned

— Must they clean and tidy the classroom now?

                  — No, they      . It       after school in the afternoon.

                  A. mustn’t; must clean                                   B. needn’t; must clean

                  C. mustn’t; need be cleaned                         D. don’t have to; can be cleaned