题目

已知有理数m,n在数轴上的对应点的位置如图所示,则下列判断正确的是( ) A.m>0           B.n<0           C.mn<0          D.m-n>0 答案：C  I forgot _____ my textbook to school, so I had to borrow one from my friend. [     ]A. bringB. broughtC. bringingD. to bring