Mary didn't come to our party yesterday because she was busy preparing for the exam. We al

问题补充：

Mary didn come to our party yesterday because she was busy preparing for the exam. We all felt sorry her.

A. of

B. for

C. except

D. besides

答案：

A. of

(答案→)B. for

C. except

D. besides

解析：此句表示“我们为她感到遗憾”.