A wide door opened at our approach and closed behind us.

It opened at her approach, but when she said, "Level one," nothing happened.

When he returned home that evening, it was not one of the servants who opened the door at his approach.

It opened at his approach, as if nothing were wrong, and he froze.

She turned away, hurrying through a small door that opened at her approach.

The side door of the vehicle opened at my approach.

It opened at her approach, and she turned into the next room quickly, searching for a target.

The door opened at his approach, but then he stopped.

Blue Moon walked to the ready room door, which opened at his approach, and glanced inside.

Unlike the front door, this one hadn't opened at their approach.