Is your brother’s room _____— No, it isn’t. His books are everywhere.

_____ he still worked hard, _____ he was very tired.

_____ is our belief that improvementsin health care will lead to a stronger, more prosperous economy

I really enjoyed talking with you —but I’m afraidI must be off now!—_____

I called you but you didn’t reply to me.—Oh, sorry, I ________ Dad, where are we going（《爸爸去哪儿》）at the cinema.