Câu hỏi: Quick! Someone call ....... police. I need help right now.

A. a

B. an

C. the

D. x

Câu 1: It is fun to learn English on ....... computer.

A. a

B. an

C. x

D. the

Câu 2: I want to introduce you to Sharon. She is ........ very nice person.

A. a

B. an

C. the

D. x

Câu 3: I want to see ...... movie. I don't care which one we see. I just want to get out of the house tonight.

A. a

B. an

C. the

D. x

Câu 4: Sam is  ...... man to speak at the conference tomorrow.

A. x

B. a

C. the

D. an

Câu 5: Can you play ..... piano?

A. a

B. an

C. the

D. x

Câu 6: She needs  ........ water. She is really thirsty.

A. a

B. an

C. the

D. x