题目

 It was a Christmas break from school almost 40 years ago. I had spent most of the morning like any boy would, __41____ outside in the snow and enjoying the sunlight on the _42__ day of the year. I liked stepping through the snow, making snowballs to __43___ the trees, and watching the smoky breath float (飘)out of my _44___. After a while,though, the _45___ got to be too much and I went ___46___.      It was warm in the house. I __47__ my wet coat and put on my favorite blue sweater. Then I walked into the __48___. My mom and grandma had just __49__ baking two loaves of Italian 向量的夹角为60°，则=（ ）A．B．C．D．