---It was a red light Willian. You the car. ---Sorry. I didn’t see it. A. must stopB. s

问题补充：

---It was a red light, Willian. 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

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