精选优质文档-倾情为你奉上2011年北京市中考一模英语试题分类汇编之【单项选择 】四、单项填空(共15分,每小题1分)从下面各题所给的A、B、C、D四个选项中,选择可以填入空白处的最佳选项。21. My mother is a science teacher. _ works in a high school A. SheB. HerC. HersD. Shes22. There _ many flowers in our school yard. They look very nice. A. isB. areC. wasD. were23. - Why do you go to school _ Saturdays this year?来源:Zxxk.Com来源:学|科|网 - Because well have the summer vocation earlier. A. inB. atC. on D. from