You’d better_your scores and see if you have passed the exam.A. add upBadd up toC. add

You’d better_ your scores and see if you have passed the exam.
A. add up
Badd up to
C. add to
D. added up

(答案→)A. add upB. add up toC. add toD. added up解析：考查动词短语的区别。A 把 加起来；Add up 3, 4 and 5 and you'll get 12. 把三、四、五相加,总数是十二； B 总共，总计；The bills add up to exactly $100. 这些帐单加起来正好一百元。 C 增加；the bad weather add to our difficulties D 把 加起来；根据句意：你最好把你的分数加起来，看看是否通过考试。Had better后面接动词原形，故A正确。

这个解释是对的