This is one of the best films .
A. that have been shown this year
B. which have shown
C. that has been shown this year
D. which you talked
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(答案→)A. that have been shown this year
B. which have shown
C. that has been shown this year
D. which you talked
解析：考查定语从句。本题关键是要看准先行词，本题的先行词是the best films；当先行词指物且被最高级修饰时，关系代词用that, 本题又是被动，所以A正确。句意：这是今年放映的最好的电影之一。