Could it really happen? In fact, it has already happened more than once in the history of the Earth. The dinosaurs were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believe that the Earth was hit by a piece of object in space. The dinosaurs couldn't live through the cold climate that followed and they died out. Will we meet the same end?
1.What is mainly described in the passage?
A.A historic discovery.
B.An event of imagination.
C.A research on space.
D.A scientific adventure.
【解析】 主旨大意题。文章主要描述了2094年,如果一颗彗星的碎片撞向地球,人类可能面临终结。这只是想象中的事情,故B项正确。
【答案】 B
2.When the first piece hits the South Atlantic, it causes________.
A.an earthquakeB.damages to cities
C.an Earth explosion
D.huge waves
【解析】 细节理解题。由第二段中的Huge waves are created and spread outwards from the hole.可知D项正确。
【答案】 D
3.Why can't the northern half of the Earth escape for long?
A.Because the land is covered with water.
B.Because the light and heat from the sun cannot reach the Earth.
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