—So she does. I can't really tell _______.
A:how old is she
B:how old she is
C:how is she old
食堂买了6袋大米,每袋重50千克.一共重____千克.
“家天下”代替“公天下”的标志:
禹死后,禹的儿子____击败____,夺取权位,建立夏朝。从此____代替了____,____代替了____。
有理数a、b在数轴上的位置如图所示,则下列各式错误的是( )