单选题 Suppose you tried to lift a 1OO-pound rock two feet, you ______ more work than if you it one feet.
  • A. would do...lifted
  • B. did...lifted
  • C. will do...will lift
  • D. would do...will lift
【正确答案】 A
【答案解析】[解析] 这是一个虚拟条件句，由suppose引起。考生如果注意到tried是过去时形式，就不难选A项了，因为与现在事实相反的表达是，从句：...did...，主句：...would do...。句意是：“如果你要把重100磅的石头抬高两英尺，那么你做的功要比抬高一英尺做的功多。”