I don't know____he will come tomorrow.Don't worry.____he comes.I'll let you know
A.whether.If B.if,Whether C.when,Whether D.that,if
人气：282 ℃ 时间：2019-11-12 06:46:34
解答
A 因为whether与前面的句子不要用逗号隔开,而if却要用逗号隔开.
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