用所给词的正确形式填空。

1. Keys Eire used for          (lock) the doors.

2. My mother works in a supermarket       (call)Xinhua Supermarket.

3. There are many         (leaf) on the ground .

4. When Edison saw the boy on the track , he quickly carried him to            (safe) .

5.I      (ask) to give a report on the importance of planting trees yesterday.