Paul fell down and broke his wrist， was a pityA. whichB. whatC. that D. it

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(答案→)A. which
B. what
C. that
D. it
解析：考查定语从句。此题用which引导的非限定性定语从句，which指代的前面的一件事。句意：保罗跌倒并摔坏了他的手腕，真实一件遗憾的事情。故A正确。