I was just to get up ______ a knock was heard on my door.A、asB、whenC、whileD、s

游客2023-09-23  17

问题 I was just to get up ______ a knock was heard on my door.

选项 A、as
B、when
C、while
D、since

答案 B

解析 when,as和while都可以表示“当…的时候”,从句用进行体。但是when还可以引导表示突然发生的动作,从句不用进行体。这种情况下,as和while不行。since表示“自从,即然”,不符句意。所以选B。句意:我刚准备起床时,听见有人敲门。
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