---How ________ your brother? ---Fine.
— We’ve never ______ astronauts’ life though we’re interested in.— Really? I’ll offer you some books about it.
— Jane. I can't find Mike in the playground.—Oh. He ______ the piano in the music room.
—Simon. I hear you are going abroad for further study. Have you decided ______?—Next September.
—Dad, shall we go to the World Park tomorrow?—Sorry. I won’t be free, but you ______ ask Mum to go with you.
You won't work out the problem ______ you understand it. So listen to me explain now.