用方框中所给单词的适当形式填空

There are ______ birds in the tree.
There are all kinds of ______ in the market. It’s hard to choose.
Do you ______ the prices of the same thing when you shop on the Internet？
You can go _____ you like these days.
We are going to send the present to Mr. Smith by ______.
----Is there ______ in that old house？
---No, there is nothing.
My mother thinks shopping in supermarkets has many ______.
It’s not safe to pay ______ the Internet.
Don’t worry. I won’t tell ______ about it.
I like swimming very much. But my mother says it isn’t a ______ sport.