问题
选择题
____ his telephone number, she had some difficulty getting in touch with Bill.
A．Not knowing
B．Knowing not
C．Not having known
D．Having not known
答案
答案：A
考查非谓语动词。逻辑主语she，与know之间为主动关系，用现在分词，否定用在分词之前。句意：不知道他的电话号码，她很难与比尔取得联系。