完成句子 
1.我认为上课不能迟到。
I ____ think we can ____  class. 
2.你饭后经常帮妈妈洗餐具吗？
Do you often____ mum ____ dishes after meal? 
3.我们得吃些食物，我们太饿了。
We ____eat some food.  We are too hungry. 
4.这件事使老师感到不高兴了。
That____ the teacher ____. 
5.因为她总是有太多的家务活要做，所以她从不开心。
She never ____  because she has ____ housework to do.