Câu hỏi: They are ........................aerobics now.

A. play

B. playing

C. do

D. doing

Câu 1: Ba and Nga often listen to music in ..................free time.

A. your

B. his

C. her

D. their

Câu 2: How many ..........................are there in the classroom?

A. table

B. benches

C. board

D. desk

Câu 3: There are .....................apples in the refrigerator. 

A. a

B. an

C. some

D. any

Câu 4: How .....................are they going to stay there ? _ For 3 days.

A. many

B. much

C. often

D. long

Câu 5: The Red River is the ........................in Viet Nam.

A. longer

B. very long

C. long

D. longest

Câu 6: Ba ..................lunch at school .

A. have

B. has

C. eat

D. does