he was unhappy because he was refused buying a toy改错
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hewasunhappybecausehewasrefusedbuyingatoy改错hewasunhappybecausehewasrefusedbuyingatoy改错hewasunhappybe
he was unhappy because he was refused buying a toy改错
he was unhappy because he was refused buying a toy
改错
he was unhappy because he was refused buying a toy改错
buying改成to buy.