--Why does Mary look so unhappy? --She has by her classmates. A. laughed; B. laughed at ; C. been laughed; D. been laughed at 查看更多

 

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--Why does Mary look so unhappy?

--She has________ by her classmates.

 A. laughed;                  B. laughed at ;            C. been laughed;           D. been laughed at

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