In China，more and more people have realized the seriousness of climate （氣候） change.Many young people have been living a low-carbon （低碳） life.
    Zheng Xiyu is one of them.She has been trying to reduce her carbon footprint.Every morning，she takes a bus to her office and it takes her about 40 minutes.But Zheng has been thinking of changing this.She wants to try a different means （方式） of transport--cycling.Riding a bicycle to work，the lady says，takes about the same amount of time as taking a bus."However，it's better for the environment and my health." she says.
    Professor Li Lin has also been leading a low-carbon lifestyle.Her office uses energy-saving lights.These lights go off themselves when they are not needed.This has saved a large amount of electricity.Another way to save energy is to double-print the paper.Professor Li says small actions like these are important for protecting the environment. "Let's say you have saved one ton of paper.That's about two and a half tons of CO₂" Professor Li says.
    Lin Hui always chooses products with a longer life when he shops.He says this helps to reduce waste.Two years ago，Lin and his friends set up an environment website，where he wanted to give some advice on saving energy and protecting the environment.
    It's easy to change to a low-carbon lifestyle.Everybody can do this and make a difference.

Use words with proper meanings and grammatical rules to fill in the blanks.
（Only one word for one blank.）
（1）In China，more and more people have realized climate

change

change

is becoming

serious

serious

.
（2）Zheng Xiyu prefers

riding

riding

to taking a bus to

reduce

reduce

her carbon footprint.
（3）Professor Li Lin says doing

small

small

things is

important

important

for protecting the environment.
（4）Lin and his friends set up an environment website

to

to

give

give

some advice on saving energy and protecting the environment.
（5）It is not

difficult

difficult

for everyone to change to a low-carbon

lifestyle

lifestyle

if he or she takes action.