问题
单项选择题
Suppose you tried to lift a 100-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
答案
参考答案: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。”