It is not expensive ,but why not buy one

I want to buy the computer but it is not空（expensive）enough 用 It is not n for us to buy expensive clothes Why the life is only one time!It is you But not him Why not buy that expensive skirt It looks good on you.I can' Why not buy a CD player to your husband ()it's too expensive Why not buy the coat?It is really ( ). The car is so expensive that Mr Green can not buy it（改为同义句） That book is not expensive. You can buy it ___ twelve _. I won not buy the car because it is too expensive 的同义句 it is not as good as the expensive one 能说成it is less good th It is not.,but. It is not much more expensive