My father has a habit of walking the river for an hour in the morning.A. betweenB. alongC

问题补充：

My father has a habit of walking the river for an hour in the morning.

A. between

B. along

C. over

D. through

答案：

A. between

(答案→)B. along

C. over

D. through

解析：between在两者之间，常和and搭配使用；along沿着； over越过，在……之上；through通过，穿过。句意：在早晨，我的父亲有一个沿着河边散步一小时的习惯。结合语境可知选B。