A number of books in the library ____ been stolen so that the number of them ____ smaller than before.
The lazy boy is indeed unusual: he knows nothing, ______ does he seek to know.
If you ______ firm action to deal with it at once, you wouldn’t suffer heavy losses tomorrow.
---Don’t you think that funny Johnson is really ______ failure?---But ______ book he wrote is very popular with teenagers.
I’m really sorry, Lucy. I ______ to help you, but I was too busy at that time.
Don’t worry. It won’t be long ______we see each other again.