用所给词的适当形式填空。

1. Look at the       . How big they are! (library)

2. Look! The boy is        to the classroom. (run)

3. There aren't        exercises on the paper. (some)

4. Children in        often play ping pong. (Chinese)

5.        homework can you do today? (how many)

6. There are some small        near Tianjin. (city)

7. Do you know       ? (where is he from)

8. Oh, your shoes are like       . (Tom)

9. Can you        a horse like that man? (ride)

10. I want to buy two bags of        for the children. (soap)

生活饮用水总大肠菌群MPN计数时，根据对样品污染度的估计，选择0.1、0.01、0.0013个稀释度，结果均未产酸产气，则结果报告为

A．9
B．6
C．＜3
D．1
E．0