知识学习的第一个阶段是（）
A．领会
B．选择
C．保持
D．应用
参考答案：B
解析：知识的学习分为四个阶段即：选择、领会、保持、运用。
As she________the newspaper, Granny________asleep.
A．read; was falling
B．was reading; fell
C．was reading; was falling
D．read; fell
We knock _____people’s doors, and they usually give us some candy ______ a treat.[ ]
A. on, to
B, at, to
C. on, as
D. on, on
