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【单选题】
Martin died in 2010. He was 100 years old!
A.
Martin stopped living in 2010.
B.
Martin began living in 2010.
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【单选题】Brightness changes for different stars. Some give off a lot of light, but others are difficult to see from Earth.
A.
Brightness is how much light something gives off.
B.
Brightness is how big something is.
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【简答题】I love to look up at night and see the moon and the ( ) .
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【单选题】The universe is really big! It contains planets, stars, and moons.
A.
The universe is Earth, our moon, and the sun.
B.
The universe is everything that exists.
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【单选题】The distance between the cities of Dallas and Fort Worth is very small. You can drive from downtown Dallas to downtown Fort Worth in about 30 minutes.
A.
Dallas is far from Fort Worth.
B.
Dallas is near Fort Worth.
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【简答题】The Earth, sun, moon, and stars are only a few things in our ( ) .
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【单选题】Benjamin Franklin discovered important facts about electricity. He showed that lightning is electricity.
A.
He read about electricity and understood the facts.
B.
He found new information about electricity.
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【简答题】Andrew's job is to study the universe. He is an ( ) .
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【简答题】Astronomers have not ( ) if there is life outside of our universe.
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【简答题】The ( ) between the sun, the moon, and the stars is very great.
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【简答题】The sun is the closest star to Earth. Its ( ) gives Earth light.
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