She took a deep breath and put the key into the lock.

He put the key into the lock, and turned it.

For some reason, the key would not go into the lock.

A key, being fit into the lock of the door!

Five minutes later, he put the key into the lock and turned it.

So of course the key wouldn't go into the lock.

On the third time of trying, the key went into the lock.

She got the right one into the lock and opened the door.

He tried to force it into the lock on the door.

His key went into the lock, and the door opened.