If we __________ paper, we will save a lot of trees.

• repeat

• recycle

• rewrite

• remark

What can we do __________

air pollution?

• reduce

• to reduce

• reducing

• to reducing

Why do you often forget to

__________ the lights when you go out of the classroom?

• turn on

• turn off

• close

• shut down

If we plant more trees in the schoolyard, the school will become a __________ place.

• darker

• greener

• dirtier

• more polluted

Do you think we should put a __________ bin in every classroom in order to keep it clean?

• Reusable

• Recycled

• Recycling

• Recyclable

My brother and I will give last year’s clothes to __________ instead of throwing them away.

• shop

• people

• charity

• survey

It is a good idea to

__________ our clothes with our friends or cousins.

• change

• swap

• turn

• take

If people turn off all electric appliances in one hour all over the world, they can save lots of __________.

• electric

• electrical

• electrician

• electricity

If we use __________ paper, we will save a lot of trees

• Fewer

• Less

• More

• Much

If we all use__________bags, we will help the environment.

• new

• cheap

• reusable

• reduced