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【单选题】
Food crops are always in er from devastating diseases and natural disasters.
A.
extremely destructive and damaging
B.
minor and easy to stop
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Many of the challenges confronting the world can be solved only through global cooperation.
A.
facing or threatening
B.
hiding from or tricking
【单选题】It is important to conserve seeds and shoots so that future generations can enjoy and use the same plants we have today.
A.
plant
B.
look after and save