Li Lei didn’t meet the famous American professor ______ he was on holiday last y

游客2023-09-23 39

问题 Li Lei didn’t meet the famous American professor ______ he was on holiday last year.

选项 A、unless
B、until
C、if
D、whether

答案 B

解析

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[originaltext]Whomdidthemanvisit?[/originaltext]A、Friends.B、Holidayguides