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【单选题】
Based on their internships, the two students are interested in_____.
A.
historical preservation
B.
geology
C.
jordan
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【单选题】The Great Wall of China consists of actual stone wall, as well as boundaries formed from_____.
A.
fences
B.
red rock
C.
hills and rivers
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【单选题】The Great Wall needs to be scrubbed to_____.
A.
clean off the graffiti
B.
prevent erosion
C.
make it shine for visitors
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【单选题】The biggest threat to the Great Wall is from_____.
A.
humans
B.
erosion
C.
failed restoration efforts
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【单选题】To protect the Great Wall from weather damage, people______.
A.
take it down
B.
add more stone to it
C.
scrub it
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【单选题】Removing salt deposits from rocks makes them more_____.
A.
stable
B.
valuable
C.
likely to erode
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【单选题】Both Petra and the Great Wall of Chine are______.
A.
red stone structures
B.
United Nations World Heritage Sites
C.
cities
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【简答题】It’s important to ( ) from the edge of the cliff. You could fall! ( )
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【简答题】I know that it’s unhealthy to consume a lot of sugar, so I’m trying to ( ) soda. ( )
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【简答题】( ) 1. give ( ) : to give something as a gift ( ) 2. give ( ) : to stop trying to do something ( ) 3. give ( ) : to return something to its owner ( ) 4. keep ( ) (something): to continue working or...
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【简答题】High-tech nomads have no central place to ( ) their mail. ( )
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