he has been worried the whole day.为何不对?怎么改?

题目

he has been worried the whole day.为何不对?怎么改?
he has been worried ( )A.all day B.all the day C.the whole day D.for the whole day
A B 中哪个对了,C D 中哪个对了,为什么?

答案

这里可以有这么些说法：
all the day
all day long
for the whole day
for a whole day
就当习惯说法吧,不太好解释.