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【题目】could，find，not，He，his，book
【答案】He couldn't find his book.
【解析】could能；find找到，his他的；book书。根据首字母大写的单词及所给单词判断，该句子是肯定句。句意是：他找不到他的自行车了。所以答案是：He couldn't find his book.
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题目内容
【题目】could，find，not，He，his，book
【答案】He couldn't find his book.
【解析】could能；find找到，his他的；book书。根据首字母大写的单词及所给单词判断，该句子是肯定句。句意是：他找不到他的自行车了。所以答案是：He couldn't find his book.