读短文，选择答案。

      I had a bad day today. I went to the bookstore in the morning. I read a storybook and it was very

interesting. Then I wanted to have some food. I went to a supermarket then, but I couldn't find my wallet

(钱包). So I went back to the bookstore and looked for my wallet. A man said he saw a wallet on the floor,

and a man took it away. I lost my wallet and I was very sad.

1. I wanted to ____________ in the supermarket.[ ]

A. read a storybook

B. buy some food

2. ____________ saw the wallet.[ ]

A. A man

B. A cleaner

3. I lost my wallet in the ____________.[ ]

A. bookstore

B. supermarket

4. I feel ____________ today.[ ]

A. happy

B. sad

由于再热蒸汽对金属的冷却作用小，所以再热器一般布置在（）或（）。