单项选择题

Before you conduct a survey, you'd better refer to certain books.

A. career
B. holiday
C. plan
D. research
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单项选择题
He has a very good personality and makes a lot of friends.
A. capacity
B. character
C. reality
D. attitude
单项选择题
It is reasonable to accept his plan.
A. useful
B. sensible
C. practical
D. feasible
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