题目

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Snow falls in the Earth's extreme North and South throughout the year. However, the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator (赤道), but only on the highest mountains. Snow contains much less water than rain, but much of the water the world uses comes from snow. In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies. Snowfall help探究动物的绕道取食，下列几组动物中“尝试与错误”次数最多的是（ ）A．小鸡、小鸭B．大鸡、大鸭C．小猫、小狗D．大猫、大狗