The Black Sea is facing ecological catastrophe as a result of pollution.

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问题 The Black Sea is facing ecological catastrophe as a result of pollution.

选项 A、threat
B、disaster
C、change
D、event

答案B

解析 这句话的意思是:由于污染造成的恶果,黑海正面临生态灾难。画线词catastrophe意为“灾难、灾祸”;disaster意为“灾难、灾祸”;threat意为“威胁、恐吓”;change意为“改变、变革”;event意为“事件、活动”。根据题意,答案为B。
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