—Canwerunacrosstheroadnow?     —No,we

问题详情：

—Can we run across the road now?

      —No, we______. We have to wait until the light turns green.

A. needn't                 B. shouldn't              C. couldn't                     D. mustn't

【回答】

D

知识点：情态动词

题型：选择题