若方程3x2m+1-2yn-1=7是二元一次方程,则m、n的值分别为( )
A.m=1,n=1
B.m=1,n=2
C.m=0,n=1
D.m=0,n=2
答案:D
— When is _____ birthday?
— It's November 20th.[ ]
A. Lisa
B. Lisa's
C. Lisa's brother
D. Lisa's and her brother's