______at the door before you come into the room.A、HitB、KnockC、TouchD、StrikeB

游客2025-02-28 6

问题 ______at the door before you come into the room.

选项 A、Hit
B、Knock
C、Touch
D、Strike

答案 B

解析考查固定搭配。knock at the door“敲门”，是固定用法。句意：你进房间之前请先敲门。故选B。

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