题目

3(a2－2ab)－(－ab＋b2)； 答案：原式＝3a2－6ab＋ab－b2＝3a2－5ab－b2. 补全对话A：1. ______B：On Mondays.A：And English?B：2. ______A：Do you have Chinese?B：3.______ We have writing in Chinese on Tuesdays.A：What about games？4.______B：Yes, we play football on Wednesdays and basketball on Thursdays.A：What about Sunday？I guess you don't go to school on Sundays.B：5.______A．Yes, we do.B．Do you play games?C．We stay at home and do our homework on Sundays.D．When do you have Japanese lessons?E．We have English on Friday.