Tom, clean up the broken glass _________ someone walks on it.
the children’s work, I saw the hope of tomorrow.
He was of having asked such a silly question.
I am sorry to keep you waiting. I’ll make shorter work of this. — . I’m not in a hurry.
here a few minutes earlier, he would have met that famous film star.
You can think of many cases Chinese students obviously know a lot of English words and expressions but can’t express themselves freely.