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。