Recent studies have discovered that fathers uniquely contribute to the development of their children, _____in low income families.

He looked at those jewels one after another ______and seemed to show no interest in any one of them.

—Mr．Wang was caught in a snowstorm yesterday．—I have known that, and ______ his new car was completely destroyed．

I shall take you back to Beijing _____ you are well enough to travel.

We couldn’t believe the news,for it was__________ good.