. ________ 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

C。


解析:

根據(jù)句意和空格后的介詞by短語可知，空格處應(yīng)填一個(gè)表被動(dòng)意義的選項(xiàng)，故可排除B和D；而選項(xiàng)A為現(xiàn)在分詞的被動(dòng)式，除表示被動(dòng)外還表示動(dòng)作在進(jìn)行，與句意不符，故也排除。

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