题目

She used to ______ in the morning, but now she is used to ________ at night.A. read; read B. read; readingC. reading; read D. reading; reading 答案：【答案】B【解析】此题重点考查be used to doing sth和used to do sth 两个句型结构的区别和意义。前者是习惯做某事，后者表示过去常常做某事，现在不做了。8．已知四边形ABCD内接于圆O，AB是直径，AD=DC，分别延长BA，CD交于点E，BF垂直EC，交EC的延长线于F．若EA=AO，BC=6，则圆O的半径4，CF的长$\frac{3\sqrt{2}}{2}$．