题目内容
11．Whathappened （happen） to the girl？She looks very happy today．分析 这个女孩儿发生了什么？她今天看起来很开心．
解答 答案：happened
根据句意"这个女孩儿发生了什么？她今天看起来很开心．"可知，事情发生在过去，故这句话应该为一般过去时，故这里应该为happen的过去式happened
点评 做这道题时要仔细阅读题中条件，然后写出所给单词的适当形式．
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