5.I have to well prepare for the math test tomorrow becausei

5.I have to well prepare for the math test tomorrow becauseit ( )30% of the exam .
A.sets up B .puts up C.uses up D.makes up
选D 占有
翻译
我必须好好准备明天的考试,因为它占了成绩的30%
set up
创立,建立,；竖立,架起,建造；开业
put up
建造；张贴；提高；投宿；提出
use up
用完,用光
make up
编造,虚构；组成；化妆；补充；和解

D. makes up 构成

D. makes up x percents of 表示占比多少，这个是固定短语