5．
阅读短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
When
you look at the sky at night, the Moon looks bigger than the stars. Actually (实际上), the Moon is much
smaller than the stars and the Sun. It's much smaller than the Earth. But the Moon
is much closer to us than any star. That is why it looks so big. If you hold a
coin close to your eyes, it looks big. If you look at it across the Moon, it
looks small.
The
Moon moves around the Earth. It makes one trip in about four weeks. The Moon
looks flat to us. But it is a round ball, like the Earth.
People
once thought the Moon had fire (火) on it. They thought the fire made it bright. Now we know
the Moon is like a mirror. It gets its light from the Sun.
Our
sunlight comes from the Sun, too. What is the Sun? The Sun is a star. The stars
we can see have their own light. There are many big stars we cannot see. Their
light has burned out. Others are still bright, but they are so far away that we
cannot see them. The Sun looks bigger and much brighter than other stars in
Galaxy because it is the nearest of all stars. The Sun and the other stars we
see are very hot, but the air around us saves us from the heat of the Sun.
The
Sun gives us light and warmth (温暖). It makes plants grow and turns leaves green. It makes life
possible on the Earth. It is a life giving star.
