题目

I used to watch her from my kitchen window. She seemed so ______ among the tall kids on the playground. The school was ______ the street from my home and I would often watch the kids as they played during a break. She would ______ dribbling(控球) and shooting over and over again. One afternoon I asked her ______ she always kept playing. She smiled, I want to go to University of California and the only way for me is to get a scholarship. I like basketball a lot. I believed that if I were ______enough to play college basketball, I would get a scholarship. My dad told me if the dream is big eno物体以8m/s2的加速度匀加速下落，在下落过程中，其机械能（　　）A、不变B、不断减少C、不断增大D、无法确定