精选优质文档-倾情为你奉上二、单项选择 (共15小题,计15分) 从每小题A、B、C、D中选出一个能填入句中空白处的最佳答案。21. Mum, I want to buy _ new toy car. But _ old one is still running, isnt it?A. the; the B. the; an C. a; the D. a; an22. The Lushan Earthquake took place _ about 8 oclock _ April 20, when the children are just beginning their first lessons.A. at; in B. at; on C. in; on D. from; to23. Young children can easily lose reading skills during the summer vacation without _.A. prac