词汇：polar bear, cold, winter — 英语选择题
题目
Read and choose. 冬天到了，北极非常寒冷，一只北极熊在雪地里寻找食物。下面哪一句描述完全正确？A. In winter, the polar bear is not cold. B. In winter, it is very cold, and the polar bear walks on the snow. C. In winter, the polar bear swims in warm water. D. In summer, the polar bear sleeps in the snow.