Ever wonder why there are so many people polluting the earth？Ever say to yourself：Hey，I wish that I could do more to help the environment？Have you ever thought about trying to help the earth but never really did？Well，here are some pretty easy and skillful ideas for that greenearth desire inside you.
●Turn off your computer.By leaving it on all day you are creating more CO₂ than a regular passenger would，driving to and from work in one day.
●Ride your bike or carpool (合用汽车)．Obviously，you are creating less CO₂，which will help the ozone (臭氧)．
● Make a garden.Even simply grow some plants in your kitchen，which will help produce more oxygen while eating up some of that evil CO₂.
● Buy local groceries.It creates less impact on the environment.Besides，you’re supporting your local farmers.
●Recycle.You had to see this coming.But you have no idea how much you are helping the environment by simply reusing a water bottle instead of buying a huge pack at the store.
● Don’t run the water while brushing.It saves you money and helps the water resources.
● Open the curtains.Natural light is much prettier and it will keep the energy usage down.
● Rechargeable batteries.You have no idea how much it takes to get rid of batteries.Do yourself a favor.Save some money and some energy.
The underlined word “impact” in the fourth suggestion  means“________”．

A．disadvantage

B．rubbish

C．effect

D．damage

If you don’t want to create more CO₂，you may________．

A．turn off your computer or open the curtains

B．turn off your computer or ride your bike or carpool

C．reuse a water bottle or buy local groceries

D．use rechargeable batteries or make a garden

Which of the following can best describe the function of  the first paragraph?

A．Leadin.

B．Argument.

C．Main body.

D．Conclusion.

The main idea of the passage is about________．

A．the importance of environmental protection

B．some ways about how to prevent pollution

C．some suggestions about how to save energy

D．some suggestions about environmental protection