Oceanographers have identified more than 50 "dead zones" around the world: areas

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问题 Oceanographers have identified more than 50 "dead zones" around the world: areas of sea that various forms of pollution have rendered______life.

选项

答案 C，E

解析冒号说明前后同义重复。设空处______life与“dead zones”(死亡区域)同义重复。conducive to有利的，invaluable to无价的，bereaved of失去的，expedient to有利的，bereftof失去的，imperative to急需的。答案选CE。

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那时，英国在全球有很多殖民地。Atthattime,Britainhadmanycoloniesaroundtheworld.