根據(jù)括號里的要求改寫句子。
1. The little child needn't be looked after by them. (改為主動句)
They ________ the little child.
2. Our English teacher often tells us to speak English in class. (改為被動句)
We ________ often ________ speak English in class by our Eng- lish teacher.
3. The room is used to play ping-pong by people. (改為主動句)
People ________ the room ________ ping-pong.
4. We saw a lot of students playing games on the playground. (改為被動句)
A lot of students ________ games on the playground.
5. Li Feng made the baby stop crying. (改為被動句)
The baby _________ crying by Li Feng.