Revise the following faulty parallel structures. 1. Buying good shoes, training daily, and above all, the competition in numerous races are the keys to becoming a world-class runner. 2. I don't know why I married someone who is miserly, sloppy and a bore. 3. Michael's vacuum cleaner squealed loudly, shook violently, and dust filled the air. 4. Jane is pretty, with brownhair, and has a graceful manner. 5. He left the city because of his lack of success in business, the departure of his friends and because his health deteriorated rapidly. 6. Mark Twain is a good representative of post-Civil War authors because of his place of birth, education, and how he wrote.