According to paragraph 3, why is it difficult for men and women to become "just" friends？
A. Historically, it has been difficult to define this kind of relationship.
B. It is not as common as same-sex friendships.
C. Men and women have different rules to act in a relationship.
D. There haven't been enough rules and examples for cross-sex relationship.
听力原文：W: Martin thinks you shouldn't use your good knife to fix that.
M: Why should he care7 It is not his knife.
Q: What does the man mean？
(17)
A. Martin doesn't take good care of knives.
B. It is none of Martin's business.
C. He wants to find a better knife.
D. He wants to fix the knife.
What does the author think of the effects of workaholic on families？
A. Constructive.
B. Destructive.
C. a double-edged sword.
D. Vague.
What signals you becoming a workaholic according to Viscusi？
A. Endless desires to make calls.
B. Long hours of computer use.
Constant needs to connect to the office.
D. Heavy dependency on electronic devices.
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