Câu hỏi: Before becoming successful, Charles Kettering, former vice president of General Motors, was so poor that he has to use the hayloft of a barn as a laboratory.

A. as

B. so poor

C. has to

D. successful

Câu 1: It is of great ________ to show your interest and politeness when you are having a job interview.

A. important

B. importance

C. importantly

D. unimportant

Câu 2: If I _______ just one year younger, I would be eligible for the scholarship.

A. am

B. will be

C. would be

D. were

Câu 3: They_________ Ho Chi Minh City last summer.

A. visit

B. will visit

C. have visit

D. visited

Câu 4: Jane never gives her mother a hand in housework _________ she has a lot of free time.

A. although

B. since

C. in spite of

D. because of

Câu 5: I was really impressed ………………….the beauty of Dubai.

A. on

B. in

C. to

D. by

Câu 6: It was hot, _________ I turned on the conditioner.

A. however

B. but

C. because

D. so