问题
选择题
—It was a red light, William. You ____ the car.
—Sorry. I didn’t see it.
A．must stop
B．should stop
C．must have stopped
D．should have stopped
答案
答案：D
考察虚拟语气。句意：威廉，红灯亮了。你应该停车。——对不起，我没看见。“must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”； “should+have+done”意思是“本来应该做某事，而实际没做。故选D。