______the key, the boy couldn’t enter his house.

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问题 ______the key, the boy couldn’t enter his house.

选项 A、To lose
B、To have lost
C、Lost
D、Having lost

答案D

解析 本题考查分词短语作状语的用法。本句的主语the boy即分词短语的逻辑主语,与动词lose(丢失)是主动关系,因此用现在分词形式作状语,且lose这一动作发生在couldn’t enter之前,用having done结构。D为正确选项。
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