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单选

The most useful kind of exercise is exercise that______.

  • A.trains the body for weight lifting
  • B.is both beneficial and inexpensive
  • C.develops the heart, lungs, and circulatory systems
  • D.enables one to run for short distances with great power
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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