Câu hỏi: It ................. last week.

A. should be done

B. should have been done

Câu 1: The tablets .............. with food.

A. must take

B. must be taken

Câu 2: Since the first space mission many communication satellites ..........................

A. was launched

B. are launched

C. have been launched

D. had been launch

Câu 3: Before leaving camp, the Boy Scouts .............. the fire.

A. were put out

B. had been put out

C. put out 

D. had putted out 

Câu 4: Concert tickets .................... at the box office.

A. is selling

B. sold

C. are sold

D. is sold

Câu 5: Tropical fruits .................... by farmers in the lowland region.

A. are grown

B. grown

C. are growing

D. grow

Câu 6: She complains that she ................................ headaches.

A. has frequently had

B. has been frequently

C. has frequently

D. had frequently been had