地火中谁是叛徒:8.listened ( ) a concert.A.for B.to.

8.listened ( ) a concert.A.for B.to. 8.A.builtB.foundC.set upD.listened to 选择填空:Wath did Lisa do yesterday? 选择:A:listens B:listen C:listened i listened ( )a concert.A.for B.to The idea had come to me as I listened to a commentator 38 my car”s tape player. |a|+|b-a|-|c-a|-|a+b| (a-b+c)(a+b-c) (A-B)*(B-C)*(A-C) {(a-b)/(a+b)}+{(b-c)/(b+c)}+{(c-a)/(c+a)}+{(a-b)(b-c)(c-a)/(a+b)(b+c)(c+a)} (a+b+c)×(a+b+c)=?