题目

已知x=2 是关于x的方程x2－4x+c=0的一个根，则c的值是    ____． 答案：4解析:略【1】I'd like to go to an exciting place for fun. (对画线部分提问)______ would you ______ to go for fun?【2】The woman outside the door must be Mr. Black. (改为否定句)The woman outside the door ________ ________ Mr. Black.【3】Do you often do your homework in pairs? (用ever替换often 改写句子)______ you ever ______ your homework in pairs?【4】The glass is used for keeping water hot. (改为同义句)People ________ the glass ______ keep water hot.【5】Can you tell me? Are there any problems with my plans? (合并为一句)Can you tell me ___________ ___________ are any problems with my plans?