用所给词的适当形式填空。   

1. I             (go) to zoo with my friend last Sunday.

2. I like            (swim) in the river in summer.

3. There            (be)a dog and two cats in the room.

4. Which            (season) do you like best?

5. Who is the            (tall) boy in your class?

6. I'm so            (excite). The book is            (excite).

7. Miss Li             (teach) us Chinese this year.

8. It is a             (wind) day today.

9. I often have            (a) apple and            (a) hamburger for mybreakfast.

10. The toy stone is on the            (three) floor.

大量事故统计表明，()不是引发事故发生的原因。

A．生产安全管理上的缺陷

B．工艺设备故障

C．风险防范意识差

D．人的误操作