Ⅴ.Read and finish the tasks.（阅读短文，完成下列任务。）
The students have a science class. Miss Li tells the students about water power. After that, she asks her students, “What do we know about water power?” No one answers. Miss Li asks again, “Try your best to answer.”
Just then a student puts up his hand and says, “Miss Li, you tell us that running water can make electricity and we can get power from the sea too. But in some places, the water is getting dirtier（更脏的）. If the water is dirty, can it still make electricity well?”
“I’m afraid the answer is no,” says the teacher. “That’s a big problem for using water power. So we should protect water.”
任务一：根据短文内容，选择正确的答案。
（）1. What class are the students having?
A. A maths class.
B. A science class.
C. An English class.
（）2. What is the main topic（主题）of Miss Li’s class?
A. How to protect water.
B. Water power.
C. Dirty water.
（）3. Why is dirty water a problem for water power?
A. Because dirty water cannot make electricity well.
B. Because students don’t like dirty water.
C. Because dirty water is not good for drinking.
任务二：根据短文内容，回答问题。
Is it important to protect water? Why or why not?

任务一: 1. B 2. B 3. A
任务二: Yes, it is. Because water is useful in our life and it can make electricity.（答案合理即可）