-------Jim, help ____ to some bread.-------Thank you.
—Hi, I’m Xiao Li. I’m very glad to friends_____ you. —Me, too. I’m Xiao Wang.
—I’m sorry that I broke your pen. Let me buy you a new one. — . I have another one.
—Mr. Hu, can you tell us how to learn swimming well?—Sure. But remember we can learn nothing well _______ hard work.
I think _______ necessary for you _______ breakfast.
As we know, ________is good for our health.