问题补充：
—After finishing your paper, look it over to there are no mistakes.
A. think about
B. try out
C. find out
D. make sure
答案：
A. think about
B. try out
C. find out
(答案→)D. make sure
解析：think about考虑；try out试验，提炼；find out找出，查明； make sure确信，证实。句意：答完你的试卷以后，检查一遍，确信没有犯什么错误。结合语境可知选Ｄ。
