填空题

______ (环境一旦遭到破坏)，让takes many years for the system to recover．

【参考答案】

Once environmental damage is done／caused
Once the envi......

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填空题
You should check all the data carefully______ (以避免严重错误)．
单项选择题
A．He has to handle a lot of work.B．There will be a lot of people and cars on the streets.C．It is going to be cloudy this weekend.D．He doesn’t like driving a car.
A．He has to handle a lot of work.
B．There will be a lot of people and cars on the streets.
C．It is going to be cloudy this weekend.
D．He doesn’t like driving a car.
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