Câu hỏi: Which activities do you think would be difficult ________ blind and deaf people?

A. to

B. for

C. with

D. of

Câu 1: She noticed a marked _______ in the children on her second visit.

A. differ

B. difference

C. different

D. differently

Câu 2: Three women, none of whom we _______ before, _______ out of the hall.

A. saw-had come

B. had seen-came

C. saw-came

D. had seen-had come

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

A. starting

B. start

C. to start

D. started

Câu 4: Digital cameras is a wonderful ___________.

A. invent

B. invention

C. invented

D. inventing

Câu 5: Every day, he _________ his buffalo to his plot of land.

A. lead

B. leads

C. to lead

D. leading

Câu 6: Nylon ______________ in the 1930s

A. invented

B. was invented

C. is invented

D. has been invented