题目内容

— I hear the famous singer Xu Song may come to Weifang next month.
— Really? _______ he comes, my younger sister will be very excited.
A.IfB.UntilC.UnlessD.Before
A
在if 引导的时间状语中,if 引导的条件状语中,主句为一般现在时,从句用一般现在时,代替将来时,故选A
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