--It was a red light William. You the car.----Sorry I didn’t see it.A. must sto

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：考察情态动词，根据it was 和I didn see it可知，该句是对过去的虚拟，所以排除AB。C意为一定做了某事 D意为本应当做某事

句意为，---当时是红灯，威廉，你本应当把车停住的。----对不起，我没看见。