众数和中位数都是用来描述平均水平的指标。某理财规划师挑选了7只股票，其价格分别为6元、12元、15元、15.5元、17元、15元和40元，则这几只股票价格的众数为（ ）。

A．6元

B．15元

C．15.5元

D．40元

句型转换。

1. I want some meat to eat.(对划线部分提问)

    ________ ________ you want to eat?

2. They are going to have a picnic next week. (用now 改写句子)

    They ________ ________ a picnic now.

3. Could you swim when you were four years old? (做否定回答)

    ________, I ________.

4. There are some noodles in the bowl. (改成一般疑问句)

    ________ there ________ noodles in the bowl?

5. It's going to rain soon. (改成同义句)

    It's going to ________ ________ soon.