题目内容

7．It's quite apuzzle（谜）to us why he did that．

分析 他为何要那样做对我们而言真的是个谜．

解答 答案：puzzle
解析：根据括号内所给中文提示可知，本题考查puzzle"谜"一词；由于横线前面有不定冠词a，故直接使用所填词的原形即可．

点评 本题考查单词填空，做此类题目时一定要根据所给中英文提示确定所填词，并根据句意及其它要求判断所填词形式是否需要改变．

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