根据句意及汉语提示完成句子

根据句意及汉语提示完成句子
1.谁应为这次事故负责?
Who should ______ ______ ______this accident.
2.他没有参加会议的主要原因是他妈妈病了,他不得不在家照顾她.
______ ______ ______ ______ he didn't come to the meeting was that his mother was ill and he had to look after her at home,
3.在水里玩真开心.
It is ______ ______ ______ in water.
4.我们想找个中国饭馆吃饭.
We want to find a Chinese restaurant ______ ______ ______.
5.难道你不能早点来吗?
______ ______ ______ a little earlier?
6.我认为与别人争吵是不礼貌的.
I don't think ____________ to argue with others.
7.每天给花浇水很必要.
____________ to water the flowers every day.
8.直到她摘下墨镜我才发现她是章子怡.
__________________ she took off her dark glasses that I found she was Zhang Ziyi.
9.据说他已经来了北京.
____________ he has already come to Beijing.
10.他们发现在两天内完成他们的工作和困难.
They found ______ difficult ____________ their work in two days.