专四

单选题The whole group worked __________ to complete the order on time．

A． at the best
B． round the clock
C． in common
D． back and forth

参考答案：B进入在线模考
译文：为及时完成订单，整个班组不分昼夜地连续工作。
固定搭配题。at the best意为“充其量，至多”；round the clock意为“昼夜不停”，亦可以写作around the clock；in common意为“共同”；back and forth意为“来回，往返，来来往往”。根据题意，[B]为答案。

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