请教一道高中英语选择题
Athome,heneverseemstohavetimeuntilafter10:30pm,_____hischildrenhavegonetobed。B、whenD、...
At home ,he never seems to have time until after 10:30 pm,_____his children have gone to bed。
B、 when
D、 by which time
为什么选B不选D呢,B哪里错了? 展开
B、 when
D、 by which time
为什么选B不选D呢,B哪里错了? 展开
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