Câu hỏi: It is very difficult for her to prevent him for smoking in her house.

A. very

B. for 

C. prevent 

D. for smoking

Câu 1: Each of the members of the group were made to write a report every week.

A. were

B. members

C. to write

D. week

Câu 2: The number of students attending universities to study economics have increased steadily in the last few years.

A. of students

B. attending

C. economics

D. have

Câu 3: My pen has very few ink in it, so could you give me some

A. has 

B. few ink

C. could

D. some

Câu 4: Tenant farmers are those they either rent a farm and work it for themselves or work the farm for the owner and receive payment.

A. they

B. it

C. or

D. the owner

Câu 5: It is recommended that people to take regular exercise.

A. recommended

B. people

C. to take

D. exercise

Câu 6: Tom said that he was trying to carry out some campaigns to protect environment and will encourage others to do so.

A. he was trying

B. some

C. campaigns

D. will