一道英语问题、He talks as if he ___everything in the world.A knows

He acted as if he ___everything in the world.A.knew B.knows He talks as if he -----everything in the world.AknowBknewcCk he acted as if he everything in the world . he talked a lot as if he knew everything in the world. 虚拟语气He talks as if he knew where she was .He talks as if he young he is ,he knows a lot about the world He talks as if he were the head of the office.为什么此处是用were而不是 一道英语倒装句问题______, he talks a lot about his favorite singers a the little boy knows many things as if he was a man..句中的was的 as if 虚拟语气的问题,He talks about Rome as if he had been to there 一道英语题~~____, he failed in the end. A. Try as he did B. Tried He talks as if he had done all the work himself.怎么翻译?