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Sincewehaveafocusedsubject,weshouldnottalk________.

A、atonce
B、athand
C、atintervals
D、atrandom
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正确答案:

D

答案解析:

译文:既然我们已经有了命题, 我们就不应漫无边际地交谈。 此题考查对固定短语的掌握情况。 at once 立刻; at hand在附近,在手头,即将发生; at intervals 间或,不时; at random 随便,任意。

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