Câu hỏi: The books ___________ have been read by the students should be put on the shelf.

A. who

B. whose

C. that

D. what

Câu 1: What _________ computer a miraculous device?

A. makes

B. make

C. making

D. to make

Câu 2: Every day, he _________ his buffalo to his plot of land.

A. lead

B. leads

C. to lead

D. leading

Câu 3: She had worked as a tourist guide before __________ a teaching career.

A. starting

B. start

C. to start

D. started

Câu 4: Nylon ______________ in the 1930s

A. invented

B. was invented

C. is invented

D. has been invented

Câu 5: She noticed a marked _______ in the children on her second visit.

A. differ

B. difference

C. different

D. differently

Câu 6: His handicap prevented him ___________ swimming all lifelong.

A. to

B. off

C. from

D. up