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We can infer from this passage that ______ .

  • A.jogging helps Americans reduce heart disease
  • B.jogging can be harmful if the runner is not properly prepared
  • C.warm-up suits are preferable to gym shorts and T-shirts
  • D.jogging is bad for the ankles and knees
试题出自试卷《2011年10月全国自主考试综合英语(一)真题及答案》
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