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Since the 1960s, there have been several policies designed to______this challenge, including institutions tailored for smallholder agriculture.

A.do
B.deliver
C.cope
D.address

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解析:题目意为“自20世纪60年代以来,为____这一挑战制定了若干政策,包括为小农农业量身定制的机构。”选项A意为“做”;选项B意为“递送,发布”;选项C意为“对付”,一般与with连用,cope with表示应对,解决;选项D意为“应对,解决”,address the challenge为固定词组,意为“应对挑战”。结合题干,答案选D。
  
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