按照你本人的实际情况回答。

1. Are you in Class Two?  

    ______________________.

2. What do you think of your Chinese teacher?  

    ______________________.

3. How much is your pen?

    ______________________.

4. Are you free this Sunday?

    ______________________.

5. What do you usually have for supper?

    ______________________.

如果p₁、q₀分别代表报告期各种商品的价格和销售量；p₀、q₀分别代表基期各种商品价格及商品销售量，公式（）的计算结果表明，由于价格的涨跌变动对销售额影响的绝对数额。