--- Can I walk across the road now, Mrs. Chen?
---No, you ______. You have to wait until the light turns green.
A. couldn’t B. shouldn’t C. mustn’t D. needn’t
--- Can I walk across the road now, Mrs. Chen?
---No, you ______. You have to wait until the light turns green.
A. couldn’t B. shouldn’t C. mustn’t D. needn’t
C