根据汉语提示完成句子。
当事故发生时，你在干什么？
________the accident happened?
房间里很黑，我什么也看不见。
It was _________I could see nothing in the room.
这个地方很好玩，你要不要到处看看？
It's an interesting place.Do you want to_______around?
昨天上午10∶30，我的父亲正在修理小汽车，而我的母亲正在洗衣服。
At 10:30 yesterday morning, _______ my father ________ the car, my mother _______ the clothes.
在这么短的时间里完成这么多的工作很难。
_______hard________so much work in such a short time.