题目

    A few years ago,an elderly woman entered my video store,along with her daughter.The  41  was displaying a serious case of impatience,  42  her watch every few seconds.If she had possessed a leash（绳子）,her mother would have been  43  to it as a means of pulling her along to  44  the rush of other shoppers.     I walked over and asked  45  I could help her find something.The woman smiled up at me and showed me a   46  on a piece of paper.  47  rushing off to find the DVD for the woman,I asked her to  48  with me so I could show her where she could find it如图，小明准备建一个鲜花大棚，棚宽BE=4米，高AE=3米，长AD=10米，棚的斜面用矩形玻璃ABCD遮盖，不计墙的厚度，请计算阳光透过的最大面积．