—I want to know if you __ to the meeting this afternoon.——I will if I __ free.A.will come;am B.come ;am C.will come;will be D.come;will be

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—I want to know if you __ to the meeting this afternoon.——I will if I __ free.A.will come;am B.come ;am C.will come;will be D.come;will be

—I want to know if you __ to the meeting this afternoon.——I will if I __ free.A.will come;am B.come ;am C.will come;will be D.come;will be
—I want to know if you __ to the meeting this afternoon.——I will if I __ free.
A.will come;am B.come ;am C.will come;will be D.come;will be

—I want to know if you __ to the meeting this afternoon.——I will if I __ free.A.will come;am B.come ;am C.will come;will be D.come;will be
A
题中第一个if 意思是“是否”引导宾语从句 主句是一般现在时 从句时态根据实际情况而定 this afternoon 所以用一般将来时 填will come
第二个if意思是“ 如果”引导条件状语从句 主将从现 填am

A
第一个IF ‘是否’引导宾语从句,今天下午的事还没发生,故用一般将来时,第二个IF ‘如果’引导状语从句,遵循‘主将从现’原则。

A我想知道你是否参加下午的会 如果我有空就来

A