题目

  39Most of his time                in reading novels.       A. are spent   B. is spent   C. were spent   D. was spending 答案：B一支刻度准确的杆秤，若换了质量较小的秤砣，用它来称量物体质量的结果A.比实际的大B.与实际质量相等C.比实际质量小D.无法判断