我觉得你多了或者少了一个单词吧,感觉应该要么是“Mary and Tom are good friends”,或者是"Mary and Tom are good at making friends"...
改成否定：1.Mary and Tom are not good friends.
2.Mary and Tom are not good at making friends.
Mary andTom are good at friends.改为否定句
1个回答
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