单项选择题

Grounded whales often struggle fruitlessly to reenter deep water.

A. violently
B. probably
C. in vain
D. at length
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He has a very good personality and makes a lot of friends.
A. capacity
B. character
C. reality
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The construction of the bridge goes on very well.
A. instruction
B. destruction
C. conduction
D. building
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