11.   Visitors are encouraged to look around and observe how things work.

12.   Visitors are often amazed to discover how little the town has changed.

13.   Visitors are welcome, as long as they bring their own tent.

14.   Visitors were disappointed to find the museum closed.

15.   Visitors will be able to examine original documents loaned from the British Museum.

16.   Visitors were a rarity in the village.

17.   A bashful child who hid in his room whenever there were visitors in the house.

18.   An explanation of photosynthesis that most museum visitors will be able to understand.

19.   It tells the rest of the world that troublesome visitors are unwelcome.