这个题我实在没看懂,would more work?
感觉应该是
Suppose you tried to lift a 100-pound rock two feet,you(would do )more work than {是if 不是of 吧} you( lifted)it one feet.
如果是这样,这是虚拟语气,suppose在这里相当于if ,表假设.就像虚拟语气If I were you,I would...
后面if you (lifted),也是虚拟.也类似于If I were you,中的were,用过去式
个人见解,供参考