Câu hỏi: I can't help _____ at her mistake.

A. laugh

B. laughing

C. laughed

D. to laugh

Câu 1: English is the _____ language on one- fifth of the land area of the world.

A. office

B. official

C. officer

D. officially

Câu 2: We spent half a year _____ this hotel.

A. to build

B. built

C. building

D. with building

Câu 3: He used _____ next to me in class.

A. to sit

B. sit

C. to sitting

D. to sat

Câu 4: This school _____ ten years ago.

A. be built

B. is built

C. was built

D. built

Câu 5: Are you interested in _____ football.

A. play

B. to play

C. playing

D. played

Câu 6: There is a _____ difference between the north and the south.

A. region

B. regional

C. regionally

D. regioner