1. This toy Is not____(suit) for young children.
2. There____(use) to be a lot of birds here, but now we can hardly see them.
3. The heavy rain stopped the visitors____ (climb) the mountain.
4. They often collect waste paper and bottles for____(recycle) to protect the environment,
5.--What"re they doing?
--They"re____ (wait) for a bus. |