Those who are attending the economic forum should pay the registration fee in full ______a week of signing up for the event.

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问题 Those who are attending the economic forum should pay the registration fee in full ______a week of signing up for the event.

选项 A、within
B、besides
C、over
D、behind

答案A

解析 根据上下文语义,此处意为“活动注册一周内要缴纳全额的活动费用”,应选可以表达在特定期间内的介词(A)within(在……时段内)。(B)besides表示“除……之外(还有)”,(C)over表示“在……期间一直……”或“在……上方”,(D)behind表示“在……后面”,用来表示时间或场所。
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