The boss in the factory made the workers_______nine hours a day in the past.A. work B. to work C. working
Look, his hat is ______ the floor(地板).
Are those your ______?
This isn’t ______ eraser. ______ is in the pencil box.
My English teacher is Mary Smith and we call her ______.
Here ______ two baseballs in the schoolbag.