I (was just) falling (sleep) last night (when) I heard a knock (at) the door.A、w

游客2025-03-14 15

问题 I (was just) falling (sleep) last night (when) I heard a knock (at) the door.

选项 A、was just
B、sleep
C、when
D、at

答案 B

解析

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Iwasjust(falling)(sleep)lastnight(when)Iheardaknock(at)thedoor.A、f