单项选择题

According to the passage, which of the following has changed the most in the last 500 years （）

A．Food
B．Chocolate drinks
C．Potato
D．Coffee

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单项选择题
It is good for local people to be well aware that tourism will （）.

A．use up a large amount of water
B．weaken their economy
C．help establish their traditions
D．help improve their life
单项选择题
The word handle in the last paragraph most probably means （）.

A．carry away
B．pick up
C．get in
D．take down
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