They decided to chase the cow away______it did more damage.A、unlessB、beforeC、a

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问题 They decided to chase the cow away______it did more damage.

选项 A、unless
B、before
C、although
D、until

答案 B

解析该题是语法结构题，考查连词的用法。连词before引导时间状语从句，通常表示主句动词发生在从句动作之前，如：He did not know any English before he went to England．在去英国以前，他一点英语都不懂。因此，根据题意和语法规则，选项B为最佳答案。

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Theydecidedtochasethecowaway______itdidmoredamage.A、unlessB、beforeC、a