The editorial described drug abuse as the greatest calamity of our age.

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问题 The editorial described drug abuse as the greatest calamity of our age.

选项 A、catalyst
B、disaster
C、casualty
D、retaliation

答案B

解析 calamity灾难，不幸事件；disaster灾难，灾祸；catalyst催化剂；casualty人员伤亡；retaliation报复，复仇。

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