Not having received an answer ,she decided to write another letter .请问 having 为何 不能省略?

________ a reply from his friend,he decided to write to her again.A.Received B.Not received C.Not having received D.Having not received 为什么用not having recieved 作句子开头而不用having not received? _______ a reply,he decided to write again.A.Not receiving B.Receiving not C.Not having received D.Having not received _______a reply,he decided to write again.A.Not receiving B.Receiving not C.Not having received D.Having not received Not having received an answer ,she decided to write another letter .请问 having 为何 不能省略? ----a reply,he decided to write agqin.A.not receiving B.not having C .having not received 选什么,为什么 ----a reply,he decided to write agqin.A.not receiving B.not having C .having not received选什么, ____ a reply,she decided to write again.a.Having not received b.Not receivingc.Not having received 为何选C? )______ any instructions from their government,they could not give an answer.　　A.Having not)______ any instructions from their government,they could not give an answer.　　A.Having not received B.Not having received 　　C.Receiving not D.Not Not having received a reply,he decided to write another为什么是NOT HAVING RECEIVED,不是NOT RECEIVED为什么这里要用动名词 为什么HAVING在这里做VERB那么RECEIVED做什么,RECEIVED本身不是动词吗?为什么还要加HAVING ____the job applied for,he decided to give up and start his own business.A.having not received B.____the job applied for,he decided to give up and start his own business.A.having not received B.not having given C.not having been received D.not having ____ an answer,I decided to write him again.A.Not to have receivedB.Not being receivedC.Having not receivedD.Not having received 英语选择题如何回答 ______ ____a reply,he decided to write again.A not receiving B .Receiving notC .Not having receied D .Having not received ______ a reply,we decided to make a long-distance call.A:Receiving notB:Not receivingC:Not having receivedD:Having not received选什么?为什么? ____ a reply, he decided to write again.A.Not receving B.Receving notC.Not having receivedD.Having not received选哪个?讲解一下…… 哪位英雄好汉帮我讲解一下英语单选＿ a replay,he decided to write again.A.Not receiving B.Receiving not C.Not having received D.Having not received 英语18.________ a reply ,he decided to write again.18.________ a reply ,he decided to write again.a.Not receiving b.Receiving not c.Not having received d.Having not received为什么 1.____a reply,he decided to write again.选项 A.Not receiving B.Receiving not C.Not having received D.Having not received 若选C表示在decided之前行不行?