During our stay in London, the guide book a great help. We all had a wonderful time.A. be

发布时间：2020-08-16 18:34:37

During our stay in London, the guide book      a great help. We all had a wonderful time.
A. behaved             B conducted          C. served         D. proved

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解析：考查动词辨析：A. behaved举止，B conducted组织，实施C. served服务D. proved证明是，句意是;我们在伦敦期间，指南证明很有用，我们玩得很愉快。选D。
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