1. The main theme of the passage: Martin's trip to Beijing and his visit to the Great Wall of China.2. A question that is not answered in the passage: How much did Martin pay for a private tour?3. Synonym for the word "protect": protect4. Choose the wrong statement based on the passage. Wrong statement: Martin knew nothing about the Great Wall of China before visiting it.5. Correct statements to assure the proposal in the passage of Martin's wonderful experience during a visit to the Great Wall of China: 2. The guide was excellent; 3. He read about the history of the Great Wall of China; 5. He took pictures of the flowers there.