There __________ great changes in our hometown over the twenty years.

句型转换
【小题1】The old man is so angry. He can’t say a word.（连成一句）
The old man is ______ ______ ______say a word.
【小题2】I bought the bike ten years ago. (同义句)
I ______ ______the bike ______ ten years ago.
【小题3】The key is used for locking the front door.（就划线部分提问）
______ the key _______ for?
【小题4】You should hang the curtains across the stage.（改为被动语态）
The curtains _______ ______ ______across the stage.
【小题5】Our school has changed greatly in the past several years.（同义句）
There ______ ______ great changes in the past several years.

In the past few years there ______ great changes in my hometown.

A. have been        B. were           C. had been         D. are

In the past few years there ______ great changes in my hometown.

A. have been        B. were             C. had been             D. are