题目内容：

完形填空

Is the river water clean now? Have you______drunk water directly from a river? I'm sure your answer is“No"．Perhaps you may have tried the water from a well(井)or from a tap．______ ，as I know，most of you only drink water from a water boiler ______ the bottled water bought from a shop nowadays．

But things were quite ______  many years ago．At that time，all the small rivers around us were very clear and the water was very clean．If you were______，you could just take some water from the river with your hands and drink it directly．It was cool and sweet．In ______ ，when it was hot，you could swim in the rivers．How pleasant it was!

But all these are in the past．Things ______a lot over these years．There is more and more waste in the world．The rivers are full of  ______ kinds of waste．Most of the river water has become very dirty ______ the pollution．Some of the river water is not even clean enough for us to wash our hands．

What a  ______ ! I wonder when I can taste the clear river water again．

1.A．already      B．just        C．ever           D．never

2.A．However     B．Though       C．Since         D．Yet

3.A．and         B．or          C．but           D．so

4.A．same        B．easy        C．difficult     D．different

5.A．thirsty      B．hungry     C．tired       D．sleepy

6.A．spring       B．summer       C．autumn       D．Winter

7.A．turned       B．have turned C．changes     D．have changed

8.A．either       B．both        C．all           D．same

9.A．because      B．because of   C．instead        D．instead of

10.A．matter      B．fact         C．1uck          D．Pity