—Must I finish the work today, Mom?

—No, you _____. You can finish it tomorrow.

A. mustn't

B. needn't

C. shouldn't

D. can't

颈椎病具有以下退行性变化，但除外()

A．椎间盘变性

B．椎体变性

C．关节间部溶解

D．椎骨钩突关节变性

E．关节突关节变性