The key answer of exercise 5

a)

The programme ends in joy if the masterpiece is genuine and in disappointment if it is a fake.

e)

1. That the painting was by Lucian Freud
2. Because of his bad relationship with Denis
3. He loves it. It reminds him of Freud's early drawings. He loves the shadows and the exaggerated face.
4. No, he has always loved it, whether it was a fake or not. Because he has been given so many different opinions over the years as to whether it's a fake or not, but has always continued to love it whatever people said about it.
5. He is going to leave it to be sold after he dies and have the money go towards helping young artists.

f)

1. gobsmacked (= so surprised that you do not know what to say)
2. swept along (= very interested or involved in sth, especially in a way that makes you forget everything else)
3. biting [our] nails (= very nervous)
4. fallen over backwards (= fainted)
5. clicked (= suddenly became clear)