问题补充：
She always looks sad, makes people feel sorry for her.
A. who
B. which
C. that
D. what
答案：
A. who
(答案→)B. which
C. that
D. what
解析：考查从句，句子makes people feel sorry for her缺少成份，缺少主语，which可以做主语，表示那件事，句子意思“她总是看起来不高兴，这使人们对她感到很抱歉”， 所以选B
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