求翻译："More and more kids become unhappy 4 they have too many activities to do. " said Mr. Wang, an expert (专家 ) of child development. "41% of the children aged 9 -13 said they felt 5 most of the time, and more than 75 % of them said that they wished they had____6___to play.是什么意思？

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" More kids become more unhappy and they have 4 too many activities to do." said Mr Wang . an expert, (expert) of child development." 41 per cent of the children aged 9 - 13 5 said they felt most of the time, and more than 75 per cent of them said that they wished they had the 6_ _ _ _ _ _ to play.