Chương 34.13 Bài Tập 142

X.

1. Have you heard
2. What's/ What has happened
3. He's/ He has had
4. he fell
5. broke
6. did it happen
7. told
8. You knew
9. you didn't tell
10. I didn't see
11. I haven't seen
12. He's/ He has had
13. He did