We must keep our room clean，for dirt and disease go________，you know

Ｉhear Peterson was badly injured in the accident.——____ . let’s go and see him.

Many officials _______ the matter were arrested and would be put in prison.

Everyone wants to reach the top of the mountain, but all the happiness happens while you it.

The little boy ________ for the apples on the tree, but of course he was not tall enough. [ ]