—It’ll take me about two hours to do the work!—Oh, ! I could do it in half an hour.
_____ worries me is _____ we’re going to pay for all this.
I’m afraid we can’t have coffee; there’s _____ left.
The classroom is almost empty, where is _____?
Don’t go to _____ places where there is no fresh air.
Energy is ____ makes one work.