单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Mark wants to travel by air.
B．Mark likes the CEO very much.
C．Mark is greatly interested in power.
D．Mark can seize opportunities in time.
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单项选择题
What might be inferred about the scientist from the sentences at the beginning of the text
A．He must choose the long-term solution to a problem.
B．He may study the problem he has an interest in.
C．He can avoid the conflict between work and pleasure.
D．He should be familiar with some engineering problems.
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