◎ 题干
___________ 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
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“___________ his telephone number,she had some difficulty getting in touch with Bill.[ ]A.Not knowingB.Knowing notC.Not having knownD.Having not known…”主要考查了你对  【现在分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。