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Li Lei didn’t meet the famous American professor ______ he was on holiday last y
Li Lei didn’t meet the famous American professor ______ he was on holiday last y
游客
2023-09-23
45
管理
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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