can

My grandpa can' t  hear clearly. There's something wrong with his______.

The boy is just stupid; I can’t ______ to him at all, even when I explain things in words of one syllable.

He is a man of great experience, ______much can be learned.

- The dishwasher looks nice. How much do you charge for it?- $1498.-It’s rather expensive.________________?- If you really want it, we can give youa ten percent discount off.

– Can you give me a discount if you I buy two of them?-___________.

---Mary, can I use your computer now? ---- ___________.It doesn’twork.

--Can I speak to Mr. Wang, please?---- ____________

- Can you come down a bit?- _____________.They are on sale today.

—You can see Mr. Smith if there is a sign“_____”on the  door of his shop.—Thanks.

 If you can live with the people suffering from cancer or AIDS for some time, you will have ____ better understanding of _____ life.