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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The earthquake has caused serious destruction to this city.
A. damage
B. dislike
C. instruction
D. wound
单项选择题
The house was seriously destroyed.
A. slightly
B. heavily
C. obviously
D. sadly
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