单选题 To be ______ I couldn't understand what he was getting at. If you wanted to know you'd better ask someone else.
【正确答案】 C
【答案解析】[解析] 本题的意思是在承认自己不明白一件事，短语to be honest的意思是“老实说”，符合题意。其他三项“A项sly狡猾的；B项humble卑下的，谦逊的；D项cowardly胆怯的”都不正确。因此C项为正确答案。