--- Joe, would you like to play _____ volleyball with us this afternoon?--- Sorry, I need to practice playing ______ piano.
If you have a holiday, why not ________ on a trip?
_____ we have finished the course, we shall start doing more revision work.
I don’t like the way ________ Mr. Wang treats his children.
______ is very important for us students to learn English well.
I’ll never forget the days ______ I spent on the farm.