mr smith has been a professor since 1994 保持原句意思：保持原句意思：mr smith has （ ）（ ）a professor for about ten years

Mr.Smith is not at home.He___to work.A.has gone B.has been C.had been D.had gone mr smith has been a professor since 1994 保持原句意思：保持原句意思：mr smith has （ ）（ ）a professor for about ten years Mr. Smith _____from Canada. He____here last year A .went;has been B.has been;has come C.was;has beenD. has come ; is Mr Smith has a _______ daughter Mr.Smith has a (v)big room. Mr.Smith has been 什么hospital什么last month Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teaching; has come D:has been teaching; came为什么选D?has been teaching是什么时态? Mr Smith with his parents ______ China since two years ago.A .have been in B has been C has been to说明理由 Mr.Smith has been here since the factory opened为Mr.Smith has been here since the factory opened为什么用has been? Is Mr.Smith still in Shanghai?—Yes,he ______ there for two months.A.has beenB.has goneC.has been toD.has gone to .Mr.Smith has been working in China ___________ 2000.　　A.in　　　　　　 B.for　　　　　 C.since　　　　　　 D.until Mr.Smith as well as his wife and daught ,to their school education a have gone b has gonec have been d has been Mr Smith __________ at this school since he ________ Xiamen .A.has been teach,came B.has been teaching,came C.taught,came D.has been teaching,has come Mr.Smith ___here for about two hours.A.has left B.left from C.went away from D.has been away from为什么不选A? Mr Smith has a telephone.改为否定句. Mr Smith has nine daughters,and each has a brother.How many children does Mr Smith have at least? Hello,May I speak to Mr.Smith?—Sorry,he isn't in.He _____ the office.A.has been to B.has gone to C.has been awayc D.has left (Mr.Smith's passport) has been issued括号里面的是什么关系啊?不是主谓,是.