31.   In theory, scientists could develop drugs that bind to the dopamine transporter, which would lock the door to cocaine.

32.   It seems that someone forgot to lock the door.

33.   Lock all doors and windows Fit security devices recommended in this booklet - and use them!

34.   Lock the door when you leave.

35.   Lock the doors and turn off the lights last thing at night.

36.   Locking your doors at night is simple common sense.

37.   Once the bailiff had locked the door, the jury foreman called for all the evidence.

38.   One night, after a violent row, Marion ran up to her room and locked the door.

39.   Quickly, she picked up the key, locked the door, and ran upstairs to be alone in her room.

40.   See, I can lock the doors all at one time.