13. B. are -> is (the Greens chỉ gia đình Greens -> số ít)
IV.
14. the moon
15. a doctor
16. a library
17. chess
V.
A. 18. T
19. F
B. 20. It's in Los Angeles, California, USA (Los Angeles, California is the most exciting city in the USA)
21. Yes, there are (It's got Hollywood, Disneyland, fantastic beaches and LA Dodgers baseball team)
VI.
1. What about going to Ha Long Bay next summer vacation? (What about + V-ing ...?)
2. Vietnam has a lot of beautiful beaches.
4. Minh goes to school by bike every day.
5. Betty doesn't live far from her office.
