Ⅲ.按要求完成下列句子，每空一词。
【小题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.
【小题2】This bike is made of steel.(对画线部分提问)
________ this bike ________ of?
【小题3】The flower is watered by Grandma every week.(改为否定句)
The flower ________ ________ by Grandma every week.
【小题4】The model planes are made by hand.(对画线部分提问)
________ ________ the model planes made?
【小题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.