my father woke up, he realized that he had forgotten to turn off the lights.A．When B．Unless C．Only

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编辑：chaxungu时间：2026-04-27 03:01:49分类：高中英语题库

【题目】______ my father woke up, he realized that he had forgotten to turn off the lights.

A．When B．Unless C．Only D．Even though

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【答案】B

【解析】句意：如果不是我爸醒来，他根本没意识到他已经忘记关灯了。when当……时；unless除非，如果不；only只，仅仅；even though虽然，即使，故选B项。