( )his telephone number ,I can't get in touch with himA. not know B.Having not know C.not knowing D.known not

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( )his telephone number ,I can't get in touch with himA. not know  B.Having not know C.not knowing D.known not

( )his telephone number ,I can't get in touch with himA. not know B.Having not know C.not knowing D.known not
( )his telephone number ,I can't get in touch with him
A. not know B.Having not know C.not knowing D.known not

( )his telephone number ,I can't get in touch with himA. not know B.Having not know C.not knowing D.known not
选C
这是一个动名词作原因状语

这个,答案应该是B

C
动词ing词组作状语,在此相当于一个原因状语从句=Because I don't know his telephone number
否定时在前面加not,

选择C。这是一个非谓语动词结构,用现在分词作原因状语,并且用否定式,现在分词的否定式用not加现在分词构成。希望我能帮助你解疑释惑。