---Look! It must be Jack on the playground.---It _____ be him. Because I saw him enter the school library just now.
You may send me a short message or just give me a call. _______ will do.
—Mrs White, why are you standing here? —I’m waiting for my son. He ___________ back from school.
—Linda, please _________ how to get there and the cost of the trip. —All right. I’ll make it at once.
It is a nice digital camera, ________ a little expensive.
Please come and cheer for our team tonight. ________your support, we’ll win the game.