The door was hard to open. - The door was difficult to open.
The door was hard to open.
The door was difficult to open.
Aren't you going to open the box? - Aren't you going to open the box?
Aren't you going to open the box?
Open the door, please. - Please open the door.
Open the door, please.
Please open the door.
Please open the door. - Open the door, please.