Questions 5 to 7 are based on the following conversation.

What does the doctor say about aspirin（）。

A. The heavier, the merrier.
B. Some form of physical exercise has to play a part in men’ s weight - loss program.
C. Attention should be paid to eating patterns.
D. Men’ s attitudes are quite different from women’ s.
E. Gaining weight has nothing to do with health.
F. Your educational role sometimes has to be more subtle.
G. Facts are indisputable.

A. to test whether smoking has a positive effect on the mental capacity of smokers
B. to show how smoking damages people’s mental capacity
C. to prove that smoking affects people’ s regular performance
D. to find out whether smoking helps people’ s short-term memory