Suppose you tried to lift a 100-pound rock two feet, you______more work than if you______ it one feet.

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问题 Suppose you tried to lift a 100-pound rock two feet, you______more work than if you______ it one feet.

选项 A、would do...lifted
B、did...lifted
C、will do...will lift
D、would do...will lift

答案A

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。”
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