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

A. office

B. official

C. officer

D. officially

Câu 1: I can't help _____ at her mistake.

A. laugh

B. laughing

C. laughed

D. to laugh

Câu 2: He couldn't go far because he was afraid of _____

A. to fly

B. flying

C. be flying

D. fly

Câu 3: There is a _____ difference between the north and the south.

A. region

B. regional

C. regionally

D. regioner

Câu 4: Are you interested in _____ football.

A. play

B. to play

C. playing

D. played

Câu 5: It's not worth _____ a tax home.

A. taking

B. to take

C. take

D. took

Câu 6: A lot of trees _____ in the garden at the moment.

A. is grown

B. is being grown

C. are grown

D. are being grown