We should make____a rule for us that the last to leave the classroom shall turn the light off.

There was nothing they could do______.

–What’s the noise ? It sounds as if it comes from upstairs.   --______. It must be the window-cleaner working , next door.         

I’m sorry you’ve been waiting so long, but it is still some time ____ Brian gets back.

That was the first time I _______ there and I was impressed by the friendly people very much.