完形填空
阅读下面短文，从短文后所给的A、B、C、D四个选项中选出能填入相应空白处的最佳选项。（共10小题，每小题1分）
As we know, life today has many problems. One of the biggest is    , such as water pollution, air pollution,      pollution and so on.
Water pollution makes our rivers and lakes     . It kills our fish and pollutes our drinking water. Air pollution is the most serious(严重的)kind of pollution.
bad for living things in the world. Noise pollution      us talk louder and makes us become angry     ．
The Earth is      home and we must save it. We can't     waste here and there. We should go to work and school      bus or with our friends in the same car. Everybody      save the Earth.

A．pollution B．problem C．protection D．pattern

A．sound B．noise C．factory D．land

A．old B．young C．clean D．dirty

A．It's B．That's C．This's D．They're

A．gives B．finds C．hopes D．makes

A．fast B．easily C．slowly D．quickly

A．your B．their C．our D．her

A．get B．throw C．grow D．bring

A．ride B．buy C．take D．by

A．have to B．may C．need to D．should