冲洗马桶的水来自

I, （） your good friend, will try my best to help you out.

You can take any seat    （）      is free.

Can you lend me the novel       （）  the other day?

Do you remember the name of the company （）      ?

He met my brother, from    （）      he got the news of my marriage.

The first time         （） I saw Premier Zhou was in 1958.

Each boy and each girl        （）  a new book.

His brother rather than his parents （）      .

There is （）         rice.

There    （）      in this room.