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AN ice ball shoots across the night sky, lighting up its path along the way, like a flying sun.
Ancient humans were afraid of the sight of comets(彗星). Many cultures believed that comets were messages sent by gods, and people thought these messages were warning signs for bad behavior. But today science and technology give us a better understanding of comets.
Last week, comet Ison ended its million-year-long journey as it flew straight toward the sun, melting most of the comet. It was hoped that comet Ison would survive this trip around the sun. Because once it got near Earth, it would have produced a great show of lights for us.
In ancient times, the coming of comet Ison might have scared people. However, now we can track a comet’s journey in our solar system. We can also study what they’re made of. There is even a project to launch a spacecraft onto a comet to study them further.
Although from the sky they look like great giant fireballs, comets are a collection of gas, ice, dust and small rocks. As a comet goes into our solar system, the sun’s solar winds blow some of the dust and gas away, giving the comet a tail. The average size of comets is about 10 kilometers in diameter(直徑). But amazingly, their tails can be 150 kilometers long! Comet Ison’s diameter was about 5 kilometers.
Today, people don’t fear comets as much as they did before. Western countries have even developed and old tradition. When people see a comet or meteoroid(流星) shooting across the sky, they call it a shooting star, People who get the chance to see one get to make a wish. It is a tradition that lives on today.
小題1:In ancient times, people thought comets were _____.
A．warning signs sent by gods
B．lucky signs for good behavior
C．great shows of lights
D．flying suns
小題2:We can tell from the third paragraph that comet Ison ___.
A．finished its long journey to Mars
B．survived its trip around the sun
C．has reached the Earth
D．was melted by the sun
小題3:When a comet travels near the sun, some of the __ will be blown away by the solar winds.
A．gas and dustB．ice and rocks
C．dust and rocksD．rocks and tail
小題4:According to the last paragraph, what tradition lives on today?
A．Being scared by comets and meteoroids.
B．Making a wish when seeing a shooting star
C．Launching spacecrafts onto comets to study them further.
D．Having a better understanding of comets

小題1:A
小題2:B
小題3:A
小題4:B

試題分析：這篇短文主要介紹人們對彗星的認識。文章介紹，古時候人們害怕看見彗星，認為這是不祥的征兆。現在，人類已經開始對其進行深入的研究，并且不再像以前那樣害怕彗星了。西方國家甚至把它發(fā)展成為一個傳統(tǒng)，即看見流星劃過天空，要許下一個心愿。
小題1:細節(jié)理解題。根據短文第二段Ancient humans were afraid of the sight of comets(彗星). Many cultures believed that comets were messages sent by gods, and people thought these messages were warning signs for bad behavior的描述可知，古時候人們認為彗星是上帝發(fā)送的警示標志。故選A。
小題2:細節(jié)理解題。根據短文第三段It was hoped that comet Ison would survive this trip around the sun的描述可知應選B。
小題3:細節(jié)理解題。根據短文As a comet goes into our solar system, the sun’s solar winds blow some of the dust and gas away, giving the comet a tail.的描述可知，太陽風會吹走一些氣體和塵土。故選A。
小題4:細節(jié)理解題。根據短文最后一段When people see a comet or meteoroid(流星) shooting across the sky, they call it a shooting star, People who get the chance to see one get to make a wish. It is a tradition that lives on today的描述可知，看見流星就許愿的傳統(tǒng)至今流傳。故選B。
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