1.I had dinner when his friend called.

2.We haven't begun to study for the test yet.

3. Don't get on a bus while it is running

4. I invited them to my birthday party yesterday,however, they hadn't come

5. Look! Somebody is cleaning the room.

6. My brother began looking for a job in January.

7. She is cooking at the moment. That's why she can't answer the phone.

8. Timson has made 13 films and I think her latest is the best.

9. I haven't seen him since we left school.

10. Jane has left just a few minutes ago.

1. was having

2. have not begun

3. is running

4. had invited/ didn't come

5. is cleaning

6. began ( giờ tháng 10 nên chia quá khứ :)), giỡn thôi vì đâu là đã có thời gian => đã bắt đầu )

7. is cooking

8. has made

9. haven't seen/ left

10. left

Chúc bạn học tốt!