[解析]
(1)D.细节推理题.第一段第一句讲狗患感冒的原因,第二句If a dog has a running nose and watery eyes,coughs or sneezes(打喷嚏),then it is quite probable that the dog has caught a cold讲狗感冒的症状.故选D.
(2)B.细节推理题.根据第三段Try to give it food which is either suggested by the vet(兽医)or is healthy for your pet.可知按兽医建议喂狗食物,故选B.
(3)C.正误判断题.根据第四段Keep your dog warm.The best place for your dog in winter is inside your house.可知A正确;根据倒数第二段Just fill your bathroom with steam and leave your dog inside the bathroom for 15 minutes.可知B正确;根据第四段At home you can also keep the dog warm with the help of carpets.可知D正确;根据第五段Increase the fluid(流质)intake as it helps a lot.可知当狗感冒时不能吃太多固体食物;故C错误.
(4)C.推理判断题.根据if you are not able to find any improvement in its health,then turn to the vet for help immediately.可知对待狗的感冒有时需要兽医的帮助;故选C.