问题描述:
I don't know when Mr.Li ____ back.But I'll call you at once when he ___ back
a.will come; will come b.comes; comes
c.come; will come d.will come; comes
为什么选D
a.will come; will come b.comes; comes
c.come; will come d.will come; comes
为什么选D
问题解答:
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