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: He drives very _____ and has got two accidents this year.

A. careless

B. carefully

C. carelessly

D. careful

Câu 2: My friend is fond of _____ TV in the evening.

A. watching

B. to watch

C. watch

D. watched

Câu 3: They are looking forward _____ Tet holiday.

A. to have

B. having

C. to having

D. have

Câu 4: We spent half a year _____ this hotel.

A. to build

B. built

C. building

D. with building

Câu 5: There is a _____ difference between the north and the south.

A. region

B. regional

C. regionally

D. regioner

Câu 6: He couldn't stand _____ for her so long.

A. to wait

B. waiting

C. wait

D. waited