按要求完成下列各题
1. We gave away some books to the children.(变为被动句)
Some books __________ __________ __________ to the children.
2. The girl came up with a good idea.(变为被动句)
A good idea __________ __________ __________ __________ by the girl.
3. Bill Gates wrote The Road Ahead in 1995.(变为被动句)
The Road Ahead __________ __________ __________ Bill Gates in 1995.
4. The key is used for locking the door.(对画线部分提问)
__________ is the key __________ for?
5. This kind of machine was invented by Tom.(对画线部分提问)
__________ __________ this kind of machine invented by?
6. The hand-held calculators were invented in 1991.(对画线部分提问)
__________ __________ the hand-held calculators __________?
7. The battery-operated slippers were owented by Julie Thompson.(对画线部分提问)
__________ were the battery-operated slippers __________ __________?
