Some foreigners will visit our school tomorrow.—Great! It’s ______to tide up our school now.

To ____ nature is to help ourselves, or we will be punished.

The children ______ a P.E. class on the playground when it began to rain suddenly.

Emily, here’s a dictionary. I hope it will help you.—Thank you. It’s ______what I need

Tom wants to know if you _________ a picnic next Sunday.– Yes. But if it ________, we’ll visit the museum instead.