Điền từ ạ , em cảm ơn

1. When I last (see)..saw..them, they (try) ..were trying..to find a new felt near the office.

2. I (walk)..was walking..a long the street when I suddenly (fell)..felt..something hit me in the black.

3. When we (drive)..were driving..down the hill a strange object (appear)..appeared..in the sky.

4. How fast (she/drive)..was she driving..when the accident (happen)..happened.. ?

5. My mother (wait)..was waiting.. for me when I (come)..came..home.

6. Mrs.Smith (invite)..invited..Mrs. Quyen to have dinner while Mrs.Quyen (vist)..was visiting..the USA

7. I (not want)..didn't want..to go with him because I (wait)..was waiting..for a phone call.

8. The doorbell (ring)..rang..while Tom (watch)..was watching..TV.

9. It suddenly (begin)..began..to rain while Linda (sit)..was sitting..in the garden.

10. The lights (go)..went..our whlie we (have)..were having..dinner.

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