题目

1.There are many cars and buses on the street．(改为一般疑问句)                                                         2. She is reading a book. (就画线部分提问)                                                       3. Jenny can fly a kite. (改为否定句)                                                        4. He hurts his nose. (改为同义句)                                  家庭经常用到的下列物质中，属于纯净物的是（　　）A．碘盐B．矿泉水C．纯碱D．白酒