Ответы
1. Sally was eating (eat) dinner last night when someone knocked (knock) on the door.
2. I began to study at seven last night. Fred came (come) at seven-thirty. I was studying (study) when Fred came (come).
3. While I was studying (study) last night, Fred dropped (drop) by to visit me.
4. My roommate’s parents called (call) him last night while we were watching (watch) TV.
5. My mother called me around five. My husband came home a little after five. When he came (come) home, I was talking (talk) to my mother on the phone.
6. Yesterday Tom and Janice went (go) to the zoo around one. They saw (see) many kinds of animals. They stayed at the zoo for two hours. While they were beginning (begin) to rain, so they walked (walk) home, it started (start) to rain so they stopped (stop) at a small café and had (have) a cup of coffee.
7. Yesterday afternoon I went (go) to visit the Parker family. When I got (get) there around two o’clock, Mrs. Parker was planting (plant) flowers in her garden. Mr. Parker was (be) in the garage. He was working (work) on their car. He was changing (change) the oil.