- 问题详情:Paulaandherhusbandhavefourkids,threepetdogs,andarabbit.Whenthehouseisverynoisy,Helen,oneofthechildren,isquietlyinventing.Ayearago,the10-year-oldhadtodesignananti-smokingposterforaschoolproject.Ratherthanaposter,shecameupwiththeideaofcre...
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