问题
选择题
A person with good manners never laughs ____ people when they are ____ trouble . [ ]
A. on; in
B. in; at
C. on; at
D. at; in
答案
答案：D
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A person with good manners never laughs ____ people when they are ____ trouble . [ ]
A. on; in
B. in; at
C. on; at
D. at; in
答案：D