题目

已知x2﹣x﹣1=0，则x3﹣2x+1的值是（） A . 1 B . 2 C . 3 D . 4 答案：B— Why not go out to have a tea over the break?— _______. [     ]A. No. I haven't got any change                B. No. I'm really not in the mood    C. No. I'm not thirsty                        D. No. It's my treat this time