I have been making cakes什么用法有那么一句 I have been making cakes. that is why my hands are all covered with flour我不知道是什么用法,谁指点下

I like making paper planes How long have you been ____that?I like making paper planes How long have you been ____that? A making B made C doing D starting不是现在完成进行时吗? A恰当吗? 阅读理解I have always been intersted in making things I have always been interested in making thing?中文?以及这句话的语法时态. he is said _two trips to china in the last two yearsa,to be making b,to make c,to have made d,to have been making 句子改错：I (A.have been) (B.learning) English (C.since) I (D.have been) ten. I have been making cakes什么用法有那么一句 I have been making cakes. that is why my hands are all covered with flour我不知道是什么用法,谁指点下 Never in my life ___ in that manner.A.have I been spoken to B.have I been spoken C.Ihave been spokenD.I have been spoken to I have been selling I have been trying I have ever been I too have been I have been to. I have been I have been in. I never there before.A.have;been to B.have;been C.have;gone to D.have;gone I have been telling you that I think you are making a great mistake .I think 是插入语吗?这句话如何翻译 Q:I'm glad to see that you _____ a lot of progress since I _____ you last.A.will make,have met B.have been making,metC.had made,met D.have made,meeting最好要有解释.个人感觉是C.不是since+过去时间用过去完成时么,但是感觉选C ---I have been to Hangzhou once(需解释) ---when____you_____there?A.did go B.have gone C.have been----I have been to Hangzhou once(需解释) ----when____you_____there?A.did,go B.have,gone C.have,been