unless we immedistely,the paly will certanly by the time we get there.Aleft,begin Bleave,have begum Cleave,begin Dleft,have begum选什么啊,选的理由

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unless we immedistely,the paly will certa
nly by the time we get there.
Aleft,begin Bleave,have begum Cleave,begin Dleft,have begum
选什么啊,选的理由

B
unless引导的从句用一般现在代替一般将来.主句这里用了将来完成【动作到将来某时为止】

  1. b....