题目内容
8.Coal is on the wayout because it's too dirty.分析 煤炭即将被淘汰,因为它太脏了.
解答 答案:out.根据"because it's too dirty"表明煤炭即将被淘汰,不再使用,而out有淘汰之意,故填out.
点评 本题考查固定用法.根据句意选择合适词汇.

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