请教一道英语题,求解释,这个要怎么选
问题描述：
请教一道英语题,求解释,这个要怎么选
No matter how hard I have tried in my English studies,I always get lower scores in tests and examinations___
A.than he
B.than him did
C.as he
D.as him
答
A
比较级,前面用了lower,排除C/D
排除B的理由是宾格不能作主语.即去除did就对.