单项选择题

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

A．She doesn’t like playing cards.
B．She has something else to do this evening.
C．She doesn’t feel like playing cards this evening.
D．She is in a bad mood.
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单项选择题
In the author's opinion ______,
A．if a person has a background of knowledge, he can read superficially over a wide field
B．an adult can build foundations in science no higher than a young man
C．a thorough grounding in the fundamental sciences is absolutely necessary for a person hoping to derive value from superficial reading over a wide field
D．a mass of detailed technical information is indispensable to creative thinking
单项选择题
The last sentence of the first paragraph can best be understood as______.
A．most scientists are obliged to teach
B．a scientist may cultivate wide interests if he teaches as well
C．in order to keep up with developments in a wider field, teaching and research are both important
D．if a scientist does not teach, he is less likely to absorb diverse knowledge
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