Skating can be good for you______correctly.A、though doingB、though doneC、if don

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问题 Skating can be good for you______correctly.

选项 A、though doing
B、though done
C、if done
D、if doing

答案 C

解析考察省略句的用法，后面的if引导的是条件状语从句，完整的形式是：Skating can be good for you if it is done correctly。后面的it指代的是前面的skating。

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