Câu 3. Ask and answer. (Hỏi và trả lời).

a.  How often do Ba and Lan go to the zoo?

- (They go there) Three times a year.

b. -  How often do they go to the park?

- (They go there) Twice a week.

c. - How often do they go on a picnic?

- Sometimes (they go on a picnic).

d. -  How often do they play sports?

- They usually play them.

e. - How often do they go camping?

- No, they never do. (They never go camping.)

f. - Do they fly the kites?

- Yes. They sometimes fly their kites.