Câu hỏi: We arrived at the airport. We realized our passports were still at home.

A. Not until we arrived at the airport, did we realize that our passports were still at home.

B. We arrived at the airport and realized that our passports are still at home.

C. Not until had we arrived at the airport, we realized our passports were still at home.

D. It was until we arrived at the airport that we realize our passports were still at home.

Câu 1: ________ at the airport more early, he would have met his friend.

A. Then he arrived

B. Had he arrived

C. When he arrived

D. He has arrived

Câu 2: Do you know that ________ longest river in ________ world is ________ Nile?

A. the/the/the

B. a/the/the

C. x/the/a

D. the/the/x

Câu 3: My parents lent me the money. _________, I couldn’t have afforded the trip.

A. Therefore

B. However

C. Only if

D. Otherwise

Câu 4: ________________________, he left the hall quickly.

A. Not be rewarded with a smile

B. Not rewarding with a smile

C. Not having rewarded with a smile

D. Not being rewarded with a smile

Câu 5: My little girl is tired now because she ________ all day.

A. studies

B. studied

C. has been studying

D. has studied

Câu 6: Scientists have invented walls and windows that can block out the noise, which allows individuals to focus on their work without ________.

A. be disturbed

B. disturbing

C. being disturbed

D. being disturbing