If the merchandise does not arrive ______ Friday, please inform the customer service representative about the delay.

admin2012-04-26 10

问题 If the merchandise does not arrive ______ Friday, please inform the customer service representative about the delay.

选项 A、at
B、by
C、with
D、in

答案B

解析表示动作完成的时间点的介词by(在……之前)

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