IV.

1. Some students often play soccer, table tennis and badminton.

2. They sometimes go swimming in the pool.

3. The members of the stamp collector's club/ They often get together and talk about their stamps.

4. Yes, they do.

V.

1. Trang is the best student in our class.

2. Which subjects do you like most?

3. How many classes does Mai have today?

4. How often do you study in the library after school?

5. Let's go to the cafeteria and get a cold drink.

VI.

1. What does your mother do?

2. A year has twelve months.

3. American students have more vacations than Vietnamese students. (fewer $\neq$ more)

4. What a dirty room! (what+ cụm từ... = it is very... )

5.  Why don't we eating out tonight in a restaurant? (why don't we + V-ing: lời đề nghị)

V.

1. Trang is the best student in our class.

2. Which subjects do you like most?

3. How many classes does Mai have today?

VI.

2. A year has twelve months.

3. American students have more vacations than Vietnamese students.

4. What a dirty room