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The house may fall down soon if no quick repairThe house may fall down soon if no quick repair work ______.A.Will be done b.is done c.Has done

题目详情
The house may fall down soon if no quick repair
The house may fall down soon if no quick repair work ______.A.Will be done b.is done c.Has done
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答案和解析
b
if(如果)条件状语从句,主将从现