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

A. explanation

B. knowledge

C. experiment

D. theory

Câu 1: 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 2: I need some small change to……..the porter. 

A. dip

B. chip

C. sip

D. tip

Câu 3: Argh! This noise is giving me a ________.

A. Headouch

B. Headache

C. Headpain

D. Headhurt

Câu 4: I talked to _______ grandmother for three hours last night.

A. he

B. him

C. his

D. himself

Câu 5: It ________ easy to paint pictures if you knew how to.

A. would be

B. had been

C. would have been

D. be

Câu 6: The man ______ car we bought was from Texas.

A. which

B. why

C. where

D. whose