The teacher pointed to the mistakes in Jack's homework and told him to be more careful ________．A.in the futureB.for a futureC.the futureD.in future
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D解析in the future表示“在将来”；in future表示“以后”．题意为“老师指出了Jack的错误并告诉Jack在以后做作业时更仔细．”for a future表示“为了前途”，the future不能单独作时间状语．