Here are the answers to the true/false/not stated questions based on the dialogue between Don and Mary:
Mary didn't visit Paris when she was in France.
- False (Mary mentioned shopping in Paris and visiting the Eiffel Tower and the Louvre.)
It was very expensive to visit the Louvre.
- Not stated (The conversation does not mention anything about the cost of visiting the Louvre.)
Mary expected the Mona Lisa to be very special.
- True (Mary mentions, "You expect to see something extraordinary.")
There is no scenery in the background of the Mona Lisa.
- False (Mary refers to "a landscape in the background.")
Leonardo Da Vinci failed to use the sfumato technique.
- False (Don states that Leonardo's use of sfumato is a sign of his great skill, implying he succeeded in using this technique.)
There are several opinions on the identity of the woman in the painting.
- True (Mary and Don discuss multiple viewpoints regarding the woman's identity.)
Leonardo Da Vinci was a man of varied interests.
- True (Don describes him as a scientist, an engineer, an inventor, a sculptor, and an architect with ideas ahead of his time.)