题目内容

4．Large amounts of soilhave been washed（wash） away by the heavy rain recently．Action must be taken to prevent serious damage．

分析 最近，大量的土壤被大雨冲走了，必须采取措施来阻止严重的破坏．

解答 答案：have been washed
根据句子里recently可知，句子时态用现在完成时，主语为Large amounts of soil修饰不可数名词，意为"大量的土壤"，所以谓语动词用单数形式．

点评 考生需掌握一些固定短语并结合具体时态灵活运用．

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