－－I can't open the front door.----Why not try ___the back do

－－I can't open the front door.----Why not try ___the back do i can't open the front door.Why not try ___the back door?A o I can't open the door with this key.Why not( )it with anothe Do not smash the door open;I can find the This is a key ____ the front door.Why you try it at the back I___(try)to open the door but I couldn't If no one answer the door,why not try knocking the back door the door is always open.why?the door (won't shut).为什么不可以填can Why don't you open the door? Why didn't you open the door?I pushed the door hard,but it__ can I have the key to the front door,please?I can't get home Try as she might ,she could not open the door.