单选题 Katie’s parents never see her as the mothering type but when her son was born she took to it like a _____ to water．
【正确答案】 C
【答案解析】[解析] Katie的父母从来不认为她是当妈妈的类型，但是当她的儿子降生时，她当起妈妈来如鱼得水。like a duck to water如鱼得水；轻而易举地。