题目内容：

Ⅲ.按要求完成下列句子，每空一词。

1.The school doesn't allow us to enter the chemistry lab without a teacher.(改为被动语态)

We ________ ________ to enter the chemistry lab without a teacher.

2.This bike is made of steel.(对画线部分提问)

________ this bike ________ of?

3.The flower is watered by Grandma every week.(改为否定句)

The flower ________ ________ by Grandma every week.

4.The model planes are made by hand.(对画线部分提问)

________ ________ the model planes made?

5.We often hear the girl sing happily in her room.(改为被动语态)

The girl ________ often ________ ________ sing happily in her room.