Tens years ago, there _____ full of fish in the lake .Now there are _____ fish .
Our country _______ a lot in the last fifty years.
My mother_______ if she ________her work this week.
There _____ an eraser, two books and three pens on the desk.
---May I play basketball ? --- No, you _____
--- _______ is your home from your school? --- About 20 minutes’ ride.