问题详情：
Many students tried their best not to make careless mistakes in the examination but some of them________ found they failed.
A．eventually B．completely
C．exactly D．effectively
【回答】
A 考查副词词义辨析。句意：许多学生在考试中尽力不犯粗心的错误，但是其中有一些最终发现自己没有做到。eventually“最终；终于”；completely完全地；exactly精确地；effectively有效地。A项符合题意。
知识点：副词
题型：选择题
