An American architect ( 建筑师 ) was visiting London. Hewanted to see all the famous buildings there so he stopped a taxi and asked thedriver to take him to all the old and famous buildings in London. The driver drove him to the Tower of London. “This is the Tower of London. It was aprison ( 监狱 ) in the old days,” he said. “It is so small. In America we could build this in a d ay.” said the American. The taxi driver took the American to Westminster Abbey. He said, — 3 — “This is a famous church. Kings and queens( 国王与王后 ) get married here. The American looked at the old building and said, “Huh... we could build this in two days.” The driver decided to take the American to a bigger church so he drove himto St Paul’sCathedral. He stopped outside the church and said, “This is the most famous church in England . The great architectChristopher Wren built t his church.” The American got out of the taxi and looked at the church. “Huh. We could build this church in three days,” he said. Next the driver took the American to the House of Parliament. “This is where British politicians ( 政治家 )meet.” “Huh.” The American said, “We could build this in four days.” The driver said nothing and drove past Buckingham Palace,the home of Queen Elizabeth. As the taxi passed the palace, the American said, “Hey! What is this building? I have never seen such a beautiful one.” The taxi driver looked at the palace and said, “I don’t know. It wasn’t there this morning.” 26. How many old and famous buildings in London are mentioned ( 提及 ) in the passage?