【单选题】
A: Must we finish the work right now? B: No, you()You can do it tomorrow.
A、needn't
B、shouldn't
C、mustn't
D、can't
A、needn't
B、shouldn't
C、mustn't
D、can't
A、We must use all kinds of tools carefully and return it after using. B、We must use every tool carefully and return it after using. C、A+B D、We must use everything carefully and keep it after using.