Could it really happen? In fact, it has already happened more than once in the history of the Earth. The dinosaurs (恐龙) were on the Earth for over 160 million years. Then 65 mil- lion 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
答案:
2. When the first piece hits the South Atlantic, it causes_________.
A. an earthquake
B. damages to cities
C. an Earth explosion
D. huge waves
答案:
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.
C. Because people there cannot live at the temperature of zero.
D. Because wars break out among countries.
答案:
4. By giving the example of dinosaurs the author tries to prove_________.
A. animals could not live in the cold climate
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