Mr Jiang's computer and my computer are differentin size,his is big and mine's smallRailway trains are different from underground trains-railway trains run above the ground byt unground trains run under itAn MP3 player is different froma CD player - an MP3 player doesn't use discs...
Mr Jiang's computer and my computer are _the same as_ in size,his is big and mine's smallRailway trains are like__ underground trains-railway trains run above the ground byt ungr...
