题目

句型转换 （1） Mary is doing her homework. (改为否定句)Mary her homework. （2） We are singing now. (改为一般疑问句) singing now? （3） They are playing games. (对画线部分提问)What ? （4） She is going to work this evening. (改为一般疑问句) she to work this evening? （5） looking, the, homes, of, the, stars, film, we, at, are, (. )(连词成句)如图，方格纸中的每个小方格都是边长为1个单位的正方形，在建立平面直角坐标系后，△ABC的顶点均在格点上，点B的坐标为（-1，0）（1）画出△ABC关于y轴对称的△A1B1C1；（2）画出将△ABC绕原点O按逆时针旋转90°所得的△A2B2C2；（3）△A1B1C1与△A2B2C2成轴对称图形吗？若成轴对称图形，写出对称轴．