- What are the rules at your school?- Don’t run in the hallways and ______ arrive late for class.

 ________it is to throw snowballs at each other on the playground after snow!

I know one of the things _____I was unsure about was _____ hard it would be to climb   this mountain.

Please ______ these books here .I need them.

 —I'd like to have some lunch but I have to stay here doing my work.—___________ what you want and I can get it for you.