阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。每个选项只能用一次。

The earth is our home. Some things we have done are good for the earth while some are bad. ___（1）___ We can see many kinds of pollution around us, especially water pollution.

Water pollution is becoming serious in my hometown gradually. One year ago, it was a village with clean rivers and beautiful mountains. ___（2）___ As a result, it makes the water dirty and smell terrible. Most of fish in the water have gone and we can’t swim in the river. ___（3）___ Water is very important to human beings, so what should we do to protect and save it?

___（4）___ The government should pass laws against water pollution. Second, we should save water in our daily life. For example, turn off the taps in time. Third, we should discover ways to reuse water. ___（5）___ Last, let’s try to spread the message about protecting and saving water. Make more people around us know the problem of water shortage and how to help to solve it.

We must save every drop of water. Don’t let our tears be the last drop of water on the earth.

A．	Worst of all, we don’t even have enough drinking water.
B．	But now, some waste water from chemical factories is running into the rivers.
C．	Today, some large cities are reusing their water.
D．	First, we should protect our water resources and not pollute them.
E．	We have polluted the earth, and it is sick now.