Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Many people still refuse to admit that smoking _________ harm to people’s health.

A. eliminate

B. broaden

C. restrict

D. spoil

A. Take care

B. Excuse me

C. What a pity

D. You’re welcome

B. answer

C. had answered 

D. will answer

A. If you put on your coat, you will freeze to death in this weather.

B. If you put on your coat, you would freeze to death in this weather.

C. Unless you put on your coat, you would freeze to death in this weather.

D. Unless you put on your coat, you will freeze to death in this weather.

A. Mr. Quyen taught Chinese for ten years.

C. Mr. Quyen has taught Chinese for ten years.

D. Mr. Quyen has taught Chinese for ten years ago.

A. however 

B. but 

C. although

D. and