Câu hỏi: He went to a seaside resort because he was keen on _____.

A. windsurf

B. windsurfing

C. to windsurf

D. to windsurfing

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

A. region

B. regional

C. regionally

D. regioner

Câu 3: While I was swimming yesterday afternoon, someone else _____ my clothes.

A. stealed

B. was stealing

C. was stolen

D. stole

Câu 4: He used _____ next to me in class.

A. to sit

B. sit

C. to sitting

D. to sat

Câu 5: He couldn't stand _____ for her so long.

A. to wait

B. waiting

C. wait

D. waited

Câu 6: He couldn't go far because he was afraid of _____

A. to fly

B. flying

C. be flying

D. fly