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owing B. about, to know C. that, to know D. about, knowing 4. It good manners others when they are in trouble. A. are, to help B. is, helping C. are, to help D. is, to help 5. Business letters must always be , but we should write in a natural way to friends. A. mon B. formal C. usual D. normal 6. How should I mark my answer ? Can I use a pencil or must I use a pen to write on it? A. sheet B. paper C. book D. note 7. It39。s a 10minute ride by car but a long wait for the bus, and it39。s a 30minute bus ride, so could you possibly give me to school? A. a lift B. a help C. ride D. a