This is the best film has been shown this year. A. who B. whom C. th

This is the best film has been shown this year. A. who B. whom C. th
This is the best film has been shown this year. A. who B. whom C. th

This is the best film has been shown this year. A. who B. whom C. th
C
This is the best film【that】 has been shown this year
引导定语从句,由于前面有最高级,指物只能用that
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