April 22 is Earth Day. Everyone on Earth should care
about and protect the earth!
The earth has warmed by about 1°F (华氏度) over the past 100 years, but why and how?
Well, scientists are not quite sure. Maybe the earth
gets warmer and warmer on its own. But many scientists say that people are
doing many things which makes the earth warmer.
First, greenhouse effect (温室效应) is a very important reason for the change of the
earth. People give out too much energy into the air every year. It makes the
earth warmer. Climate (气候) change is another important reason.
Sometimes it becomes too hot and sometimes too cold. Sometimes there is too
much rain and sometimes too little. The change of the climate makes the earth
warmer. In turn, the warmth of the earth changes the climate, too.
When the earth becomes warmer, there may be more rain
and a rise in sea level. It will affect the growth of plants, animals and
people. On a Pacific island, 100 people have to move to higher ground because
the sea is rising. These people can no longer live on the coast. Before that,
two islands without people went underwater in 1999. Scientists say that the
seas can rise by nearly one metre by 2100.
People can affect the earth's air, land and water. As
for us, we can do many things to protect the earth. For example, we can use
fridges less. We can tell more people about protecting the earth.
1.Earth Day is probably set for people to ______.
A．learn more
about the earth B．make full use
of the earth
C．take better
care of the earth. D．study the
warmth of the earth
2.We can infer (推断) from the
passage that the reasons for the warmer earth are
______ now.
A．not very
clear B．completely
secret C．well known D．not given yet
3.Greenhouse effect comes from______.
A．sea rising B．climate
change C．nature's
unbalance D．people's
activity
4.The passage mainly tells us that ______.
A．there is more
rain now B．we should
protect the earth
C．we must stop
pollution D．sea level is
getting higher
