Here are the best answers for the questions provided:

1. **A. is-on-in** (A big table and six chairs are in/on the right of the bed.)
2. **B. usually helps** (Dave usually helps his mother cook dinner at 8 p.m.)
3. **A. under** (You should never stand under a tree when it rains heavily.)
4. **C. large** (Is Hanoi more large than Dalat?)
5. **A. torch** (Exciting. He should bring the torch.)
6. **B. can’t** (You can’t pick up flowers in the school garden.)
7. **C. shouldn’t** (Students shouldn’t look at other students’ work. It’s against the rules.)
8. **D. art gallery** (My friend is interested in paintings, so her dad takes her to the art gallery on weekends.)
9. **A. make** (You shouldn’t make things on the first day of Tet.)
10. **C. How** (How do Vietnamese people prepare for Tet?)

Feel free to ask if you have more questions!