Our classroom must___  _ every afternoon.

句型转换。
1. They make these watches in Shanghai. (改为被动语态)
    These watches       _____                  Shanghai.
2. This tree can be moved to another place.(改为一般疑问句)
           _____this tree ________to another place?
3. These rooms were decorated by a few hoys yesterday  morning.(用tomorrow改写句子)
    These rooms____  __ _                by a few boys______     .
4. These newspapers you have read should be throw way.(改为否定句)
    These newspapers you have read____                          away.
5. The robot was improved by a young man last month.(改为主动语态)
    A young man   _______      _____        _____     last month.

用所给词的适当形式填空。

—Excuse me, what's this for?
—It's a cleaner and it _       to pick up dirt.

Don't put off today's work till tomorrow. l mean, today's work         _today.

Waste paper shouldn't        everywhere .It's our duty to keep our city clean.

The book can           next year.    

Oh, this is really a big shop. Do you know when it       ?

This English song ______by the girls after class.  

His new book      next month.