下面句子是2016年四川高考考试英语阅读理解B中的句子:
Our own experience working together on health, development, and energy the last twenty years has been one of the most rewarding parts of our lives.
问题:the last twenty years前面为何没介词?它可以单独作状语吗?
该问题已在这里一并解答了:
http://ask.yygrammar.com/q-21940.html