Dropping litter ______ never allowed in our city.

Bruce _________his legwhen he _____ in a football match yesterday afternoon

Many in the company doubted whether the new product could bring in ____ those sold

This is ______ eraser. ______ eraser is in the pencil box.

In order to continue to live well when we leave school, we must _______ learn some useful skills as well as study in the school.