Câu hỏi: The articles that John has written .................. difficult to understand.

A. has been

B. was

C. are

D. is

Câu 1: The music that they listen to .................... them to relax.

A. help

B. are helping

C. helps

D. helping

Câu 2: ...................... known as an industrial center, Hartford was the home of manufacturers of firearms,typewriters, bicycles, and even cars.

A. Although

B. Because

C. Once

D. Owing to

Câu 3: .................... us with the vocabulary exercises.

A. Our teacher helps

B. Always helps

C. Our teacher

D. Helps to

Câu 4: ...................... important to have a good job.

A. Is it

B. It’s

C. It

D. Is

Câu 5: Some students are nervous of computers or anything high-tech ................. others enjoy newchallenges and regard learning how to use computers as a kind of game.

A. and

B. but

C. while

D. however

Câu 6: This film is for adult only;............., children under 18 cannot be allowed to enter the cinema.

A. otherwise

B. for

C. therefore

D. however