题目

阅读下面短文，从每题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。I loved my first gradeteacher, Mrs Gross. She had such a sweet 1.I wasn't sure what her 2 wasat the time but she already looked very grandmotherly. She never yelled at or 3her students. To me, it 4having a second grandmother as my teacher.Every day I arrived at the classroom and sat 5 at my desk with a big smile on my face.One such 6 is still with me to this day. We were 7 math problems that were printed on thechalkboard. I8firstand lifted my head up just as Mrs Gross walked upbehin姚明投篮动作优美，他在完成投篮动作时，起支点和动力作用的分别是A.骨、关节 B.关节、肌肉 C.肌肉、骨 D.骨、肌肉