—It was a red light William. You the car. —Sorry. I didn’t see it. A. must stopB. should

问题补充：

—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：

A. must stop

B. should stop

C. must have stopped

(答案→)D. should have stopped

解析：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。