The key answer of exercise 2
The key to exercise solutions in chapter 1.5 - Grammar for the textbook Focus 3 - Student's Book with authors Daniel Brayshaw, Vaughan Jones, Bartosz Michałowski and Sue Kay from Pearson Education
Question
Read about the real Mona Lisa. Why does the curator think that the Mona Lisa is smiling?
Answer
Because she's been listening to people's silly questions for over 200 years.