There are two cars in front of the house.

--One is mine, ________ is the mother's,

A．other

B．another

C．the other

D．others

由具体形象思维向抽象逻辑思维过渡的关键年龄期为（）。

A.幼儿期

B.小学低年级

C.小学高年级

D.青春中期

E.青春晚期