Complete the sentences with one word in each gap.

We were all surprised when John, who had never been interested in the environment, suddenly decided to become a Greenpeace activist.
1 If you have any questions about the well-being of your pet, you can ask Ben Brown,_______ will be our guest next week.
2 The company has just decided to expand its headquarters, _______ will take some two years to complete.
3 The Devil's Mouth, _______ two big rivers meet, is a beautiful place and a good spot for a short walk.
4 It has just turned out that professor Wellington, _______ theories have often been ignored, is right after all.
5 Most people in Bhutan, _______ is a very small country in the Himalayas, are Buddhist.