[解析]
(1)D.细节推理题。根据第一段和第二段One January morning,Mr.Smith is walking his dog Jack in the park. He doesn't think too much,and jumps into the cold water.在一月的一个早上,史密斯先生正在公园里遛狗,他没想太多就跳进了冷水中,因此推断天气比较寒冷,因此推断故事发生在一月的一个寒冷的早上,故选D。
(2)B.细节理解题。根据第一段He is sitting under a tree and Jack is running on the ice lake.Suddenly(突然),the dog falls into the water and can't get out.他正坐在树下而杰克在冰面上走,突然,狗掉进了水里而且出不来,可知当狗掉进水里时史密斯先生正坐在树下,故选B。
(3)B.词义猜测题。根据第二段He doesn't think too much,and jumps into the cold water.他没想太多就跳进了冷水中,因此判断对史密斯先生来说在冷水里游泳是困难的,他只是想着救杰克,因此猜测him代指的是史密斯先生。故选B。
(4)A.主旨大意题。根据最后一段Animals are our good friends.Can you do the same for them like Mr.Smith?动物是我们的朋友,你能像史密斯先生一样做同样的事情吗,据此判断作者想告诉我们的是要善待动物。故选A。