题目

______, they would certainly come and help us. A. Had they time   B. Do they have time     C. Had they have time       D. Did they had time 答案：A 解析: 这是一个if引导的条件从句的省略，如果包含had, were, should, 或could, if的虚拟条件句省略时，就要将这些词放在主语前面作部分倒装。

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