【单选题】形容词比较级用于句子中时,一般跟than 连用,两者进行比较时要求前后比较成分在结构上要平行,但是有时可以省略重复的成分,但是谓语动词一般不可省,重复的动词可以用助动词代替,请判断下列哪一项的结构有误。
A.
It's more necessary than ever for us to work harder.
B.
The yield this year is better than in any normal year.
C.
She makes more money in a week than I in a month.
D.
month.The house is bigger than we thought