Give the correct form of the verbs:
1. He (break) ... his arm when he (play) ...tennis.
2. How fast ... she (drive) ... when the accident (happen) ...?
3. The light (go) ... out when we (have) ... dinner. But it (come) ... again after about 10 minutes.
4. It suddenly (begin) (rain) ...... while Laura (sit)... in the garden.
5. I (walk) .... along the street when I suddenly (feel) .... something hit me in the back. I (not know) .... what it was.