第23题: [单项选择]______ the knowledge, he didn't know how to ask the way. A. Knowing not B. Having not known C. Not knowing D. Not to know 参考答案:C 答案解析:[解析] 现在分词结构作状语,表原因,其逻辑主语与句子的主语是一致的,其否定式是在前面加 not。句子没有先后时间顺序,不用现在完成时,B项错误,只能选C。
A. One who once had sales practice. B. One who has already a client base. C. One who ensures a long term success. D. One who promises to find new clients. 参考答案:A