题目：
读短文，选择正确答案。
My name is Betty. I live in China. I study in Shanghai No. 6 Primary School. My birthday is coming. It's in
August. On my birthday I often get up at 7: 30. I buy a lot of food with my mother in the supermarket. Usually,
I have a good time on my birthday.
In the evening, I eat dinner at 6: 00. Then I have a birthday party. At the party, we play games and eat a big
birthday cake. I eat ice cream, too. It's my favourite.
1. When is Betty's birthday?[ ]
A. In fall.
B. In winter.
2. A supermarket is a _____________.[ ]
A. store
B. playground
3. Is Betty happy on her birthday?[ ]
A. Yes, she is.
B. No, she isn't.
4. Does Betty like to eat ice cream?[ ]
A. Yes, she does.
B. No, she doesn't.
5. What do they do in her party?[ ]
A. They watch TV.
B. They play games.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D解析：一般说来，资本成本是一种机会成本，这种成本不是实际支付的成本，而是一种失去的收益，是将资本用于项目投资所放弃的其他投资机会的收益，因此被称为机会成本。
