－Whatdo you think we can do for our aged parents－You_______do anything except to be with them and be yourself.

Bill has made much progress in his study through his hard work.–So _________. And he has set a good example for other students.

When we feel sad, some colours can _______.

I was so familiar with him that I recognized his voice I pick up the phone.

We must try our best to stop the pollutionahappier life.