一道英语单选题,帮忙翻译并简析,不胜感激
A conductor was invited to keep us_____in the singing at the School Art Festival.
A.in common B.in advance C.in time D.in return
人气：292 ℃ 时间：2020-06-14 07:41:26
解答
A conductor was invited to keep us_____in the singing at the School Art Festival
B.in advance
提前作好准备
A.in common（通常） C.in time （准时,按时赶到）D.in return（回报）
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