Give the correct form of verbs in brackets

I/ Give the correct form of verbs in brackets:

1. I (wait) for …………my friend outside the stadium when he (arrive) ………… .

2. While he (watch) …………….. 7o’clock news, the phone (ring) ……………….

3.Mrs. Smith (invite)……… Mrs.Quyen to have dinner while Mrs.Quyen      (visit)…………… the USA.

4. When I (come) ……………….., they ( do) ……………….. their homeworks.

5. How fast ………… the boy (ride) ……… when the accident (happen)…….. ?

6. It (rain) ………… while Tuan and his brother (play) ………….. soccer yesterday.