1: Why don't we go to Da Lat this summer vacation?
2: He is a carefully driver
3: Why don't we read books in the library?
4: You ought to do exercise morning everyday
5: Lan's mother is a hard worker
6: She speak French very fluently
7: He prefers watching TV to listening to music
8: TV viewers can take part in the contest programs
9: Are you free on Sunday morning?