not knowing how to do it,______a he asked me gor helpb i helped him solve the problemc the question remained unansweredd i was asked to help him为什么

how to do the homework,I went to ask my teacher for help.A.Not to know　　 B.Not knowing 　C.Knowing not　　 D.Not known 选项 原因 ___help the people in the snowstorm in the south made him worried.A not known how to B unknown what to do to C His knowing not how to D his not knowing how to ____,he asked the teacher .为什么选BA.Not knew how to do B. Not knowing what to do C.Didn't know what to do D. Because not know how to do it. The old lady ,not ______ how to surf the Internet ,decided to learn it from her grandsonA.know B.known C.knowing D.to know ______ how to operate a washing machine,I had to ask my wife to show me the correct proceduresA.Not known B.Not to know C.Not knowing D.Having not known Not knowing how to purr is a great handicap这话什么意思 I swung around to his back,not even really knowing how I managed it, not+doing用法--D--anything about the accident ,he went to work as usual.A.Not know B.Known not C.Knowing D.Not knowing which club to join,the girl asked her father for adviceA.Known not B.Not known C.Knowing not D.Not knowing为什么不选B ___how to do the work,he asked the old scientist for help.A.Not knowing B.Knowing not C.Having not known D.Having known not ____how to use a computer,he felt it difficult to do the work well.A Knowing B Not to know C Knowing not D Not knowing是选不定式做状语还是选分词?到底他们也说明区别呢? 英语词汇题3.He stood there ,not knowing what to do.3.He stood there ,not knowing what to do.A.helpful B.helplessly C.helpless D.helpfully ______how to do it , we had to help him.A.His not knowing B. The boy knowing notC. He not knowing D. The boy's not having known请详细分析 forgive me for not knowing how to joke,to say you will take it seriously这是病句么 ______anything about the accident,he went to work as well.A.Not knowB.Know notC.Knowing notD.Not knowing这道题为什么选D呢~ ___anything about the accident, he went to work as usual.a not know b.known notc. knowing d.not knowing选哪个?为什么?怎么翻译? The students sat there,___ what to doA.doesn't knowing B.didn't knowing C.not know D.not konwing Not knowing how to operate a switchboard,I had to ask the office for help.这句话为什么开头要用Not knowing而不能用Having not known