听下面一段对话，回答1-4题。 1. How did the man know about the house to be rented? A. He read today's newspaper B. He saw a sing C. He asked his friend 2. Why does the woman want to rent the house? A. She feels it is so quiet B. Her husband and children died C. Her child needs a roomer 3. Which of the following is free of charge? A. Cooking meals B. Washing clothes C. Electricity and gas 4. What is the man's nationality most probably? A. Canadian B. Chinese C. American