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问题: 高中英语选择1

1._______ by the advances in technology, many farmers have set up wind farms on their land.

A being encouraged
B encouraging
C encouraged
D having encouraged

详细解释一下,谢谢!

解答:

选C
首先是语态,很明显是被动的(被先进的技术所鼓励) 所以排出B和D.
后半句have set 就是完成时,A是表示现在情况,就不对了.