11.   He pressed a switch on the wall and the door opened.

12.   He thought the door was locked, but he turned the knob and the door opened.

13.   I gave the woman a nod, and when the doors opened Janir and I stepped out on to the concrete platform.

14.   I wanted to be first in the queue when the doors opened.

15.   Immediately, the arena doors opened to admit the four armed guards.

16.   It was as if a door had opened before him into a dim but positive light.

17.   She heard a door open and then close.

18.   She was just boiling some water when the door opened and Julius walked in.