一道高中英语语法题
Well,Iforgottobringmymobilephoneyesterday.
_______.Youcouldusethephoneonmydesk.
A.needn'thavebroughtB.didn'tneedtobring
C.don'thavetobringD.shouldn'thavebrought
答案应该选B,为什么?请说明原因,
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