题目内容

—Can you guess if they ________tomorrow?
—They will come if they ________free, I think.
A．come; will beB．will come; will beC．come; areD．will come; are
D

试题分析: 句意：你能猜得出是否他们明天来吗？我想，如果他们有时间会来的。if如果，主句为一般将来时，if引导的条件状语从句用一般现在时代替一般将来时；if是否，引导宾语从句，时态根据实际情况确定，故选D
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