Question

—Can you guess if they ________tomorrow?
—They will come if they ________free, I think.

A．come; will be

B．will come; will be

C．come; are

D．will come; are

Answer 1

D

解析试题分析: 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
考点：考查连词。