Câu hỏi: I soon rose to a position of importance in the firm, ................ I was energetic, popular, andconscientious.

A. thus

B. because

C. so

D. for

Câu 1: Taking a trip to the mountains .................... more fun than going to the beach.

A. are

B. were

C. is

D. have been

Câu 2: Chicago ............... city in the Midwest.

A. is an important

B. an important is

C. important is

D. is it important

Câu 3: The world wouldn’t be a better place ............... more people respected English teachers.

A. if 

B. unless

C. except

D. when

Câu 4: The articles that John has written .................. difficult to understand.

A. has been

B. was

C. are

D. is

Câu 5: ...................... 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 6: I have studied English for 10 years, ................ I can’t communicate well with foreigners.

A. but

B. yet

C. however

D. nonetheless