单项选择题


You will hear some dialogues or monologues. Before listening to each one, you will have time to read the questions related to it. While listening, answer each question by choosing A, B, C or D. After listening, you will have time to read your answer. You will hear each piece ONLY ONCE.
Questions 11 ~ 14 are based on the following passage.
Why do smokers welcome low-tar cigarettes

A.Because they last longer.
B.Because they are less harmful.
C.Because they taste better.
D.Because they cost less.