He entered the building through the revolving door.

He wrote a letter and sent it to his friend.

I write a diary every day.

Please push the door to open it.

The door is marked with 'Push'.

He opened the Western-style door.

Please be careful as the platform door is closing.

This train has a selective door operation feature.

The swing door was opening and closing in the wind.

He picked up a pen to write down the poem.