题目内容
（请给出正确答案）
[主观题]
— Is it all right if I keep this photo？A．No. You don'tB．No. It shouldn'tC．I'm afraid notD．
— Is it all right if I keep this photo？
A．No. You don't
B．No. It shouldn't
C．I'm afraid not
D．Don't keep it
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A．直接成本
B．间接成本
C．效益
D．效果
E．效用
