Câu hỏi: We visited ...... Canada and ........ United States two years ago.

A. Ø - Ø

B. the - Ø

C. Ø - an

D. Ø - the

Câu 1: Mrs. Lan went to ......... school to meet her son's daughter.

A. a

B. an

C. the

D. Ø

Câu 2: My hometown is on the bank of ........ Hong river.

A. a

B. an

C. the

D. Ø

Câu 3: There are billions of stars in ....... space.

A. a

B. an

C. the

D. Ø

Câu 4: .......... deaf are .......... people who can't hear anything.

A. Ø - a

B. The - the

C. Ø - the

D. Ø - Ø

Câu 5: ......... Sun is a star.

A. a

B. an

C. the

D. Ø

Câu 6: When was .......... computer invented?

A. a

B. an

C. the

D. Ø