homework的用法：
1.I haven't done my homework.
我还没有做作业。
2.Have you done your homework?
你的作业做了吗?
3.I have to do a lot of homework for tomorrow's meeting.
明天要开会，我还要做许多准备工作。
4.It was late at night and he was still working away at his homework.
夜深了，他还在做课外作业。
5.When teachers assign homework,students usually feel an obligation to do it.
当老师布置家庭作业的'时候，学生们通常觉得做作业是分内之事。
6.Our teachers assign too much homework.
我们老师布置的家庭作业太多了。
7.Sorry,I have so much homework to do,I can not go to Happy Valley with you.
对不起，我有很多作业要做，不能和你去欢乐谷。