He talks as if he ______ everythingA．knowsB．was knownC．will knowD．knew

He is talking so much about America as if he ____ there.A、had beenB、has beenC、wasD、been

He talks as if he______ everything in the world.A．knowsB．knewC．had knownD．would have known

He is over fifty, but he looks as if he ____________ only in his thirties. A. were

Tom is immensely curious about everything and as eager to find the answers as if he______d

Helen believes if a man robs her of five dollars it is the same as if he _____ a hundred

If only he ____ quietly as the doctor instructed he would not suffer so much now. [ ]A. lies B. lay