11. There are a lot of clouds! It is going to rain soon.

12. We sat at the breakfast table when the doorball rung.

13. He was meeting a lot if friendly people while he was working in California.

14. The students played cards when the teacher came in.

15. While the children were sleeping, their parents were watching TV.

16. It was starting to rain while she was watering the flowers in her garden.

17. While i was opening the door, She was standing outside.

18. While Henny was having a drink at the bar, his wife was swimming in the sea.

19. He was hearing a loud bang while he was talking to his friend.

20. After Larry saw the film on TV, he decided to buy the book.

                                 Chúc bạn học tốt~~

Hình ;