—My keys. I can't remember ___________.
A:where did I put them
B:what I put them
C:where I put them
D:what did I put them
读课文《“年”的来历》,老头是个什么的老头,老婆婆怎样对他?
a×b=6×8 写成比例式是 a∶6=b∶8
(make it a rule that...)