John is so strongly built that he looks as if he ______ an eleph

John is so strongly built that he looks as if he ______ an elephant.
A、lifts
B、is lifting
C、lifted
D、could lift
【正确答案】：D
【题目解析】：as if引导的是与现在事实相反的虚拟。虚拟语气需要往后推一个时态，所以这里选D could lift。