题目内容
【题目】Many beautiful fish are fast (appear) because of the serious water pollution.
【答案】disappearing
【解析】句意：许多美丽的鱼很快……因为严重的水污染。从句意可知是消失了disappear，前面有be动词，故用现在进行时，填disappearing。
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题目内容
【题目】Many beautiful fish are fast (appear) because of the serious water pollution.
【答案】disappearing
【解析】句意：许多美丽的鱼很快……因为严重的水污染。从句意可知是消失了disappear，前面有be动词，故用现在进行时，填disappearing。