. The customer bargained with the shopkeeper for a long time, and finally they agreed ___________ the price.

--Thank you very much.

--Not at all , I was____________ glad to help.

It is the protection for the trees___________ really  matters, rather than how many trees are planted.

We can’t go on with the experiment because the computer_________.

You can't see the___________ now for they are having a meeting at the moment.

--Where is Xiao Wang?

--I don't know. He__________ be in the library.

--I can't find Mr. Smith.

--It was in the hotel___________ he stayed.

. Neither of them knew what        was doing.

"Please __________why you're so late," said his girlfriend.

I'm sorry. I _____________ you__________ to me.