__ his telephone number or e-mail address, she had some difficulty getting in to

题干

__ his telephone number or e-mail address, she had some difficulty getting in touch with John.

A．Not knowing

B．Not to know

C．Not known

D．Not having known

上一题下一题 0.4难度单项选择更新时间:2012-09-11 09:03:11

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