________histelephonenumber,shehads

发布时间：2020-07-25 14:07:22

________ his telephone number, she had some difficulty getting in touch with Bill.A.Not knowingB.Knowing notC.Not having knownD.Having not know

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A解析根据句意，应用现在某事分词表示原因，且现在分词的否定时是在它前面直接加not。
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