Câu hỏi: The farmers are working________the farm not _______the field-in.

A. on/ at

B. on/ in

C. at/ on

D. in/ on

Câu 1: Reading is helpful in __________the researchers’ knowledge.

A. developed

B. develop

C. developing

D. to develop

Câu 2: He never goes to bed __________he finishes his homework.

A. unless

B. if

C. when

D. while

Câu 3: We couldn't see the moon because there were so many__________

A. surfaces

B. Atmospheres

C. stars

D. clouds

Câu 4:  It's no good ___________your father about your failure.

A. to tell

B. told

C. telling

D. tell

Câu 5: If I _________you, I wouldn't take him to the exhibition.

A. was

B. am

C. were

D. like