Câu hỏi: Einstein's …….is really too difficult for the average people to understand. 

A. explanation

B. knowledge

C. experiment

D. theory

Câu 1: Mary: How often do you go hiking?

A. Most weekends

B. I go with three friends.

C. We stay for a weekend.

D. I often go hiking with my family.

Câu 2: He can make change in his timetable when he wants to. It means that he's got a……….timetable. 

A. modern 

B. fashionable

C. flexible

D. convenient

Câu 3: Because of the increasing enrolment, the school has to employ teachers who are not…….for their jobs. 

A. qualifying

B. qualified 

C. worth 

D. skilled

Câu 4: The elevator isn't running now. It must be….order. 

A. out of

B. for

C. into 

D. behind

Câu 5: I talked to _______ grandmother for three hours last night.

A. he

B. him

C. his

D. himself

Câu 6: Can you see the man ______ is sitting at that table?

A. whose

B. who

C. whom

D. which