You’d better___________on foot.
We should stop people from_____ the street when the light is red.
_______ necessary for us _______ English well.
—Watching TV too much _______ bad for your eyes.—I’ll go to bed right away.
---Would you mind ______ the door? It’s cold outside.--- OK. I’ll do it right now.
---Is doing morning a good habit? ----Yes, it is.