题目

—I want to know if Maria ____ us in the fashion show tonight. —I believe if she ____ her homework，she will join us. A．joins；finishes  B．will join；finishes  C．joins；will finish 答案：B若分式方程无解，则m的值为（　　）A. ﹣1 B. 1 C. ﹣2 D. 2