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— Must I return the book this week?

— No, you ____. You can _　 it for 20 days.

A. mustn't: keep B. needn't; borrow　 C. needn't; keep　　　 D. mustn't; borrow

—Must I return the book this week?
— No, you ____. You can ____ it for 20 days.

— Must I return the book tomorrow?

— No, you ________. You can keep it for three days.

A．mustn’t          B．needn’t          C．can’t            D．may not

—Must I return the book this week?

— No, you ____. You can ____ it for 20 days.

A．mustn't: keep                          B．needn't; borrow

C．needn't; keep                          D．mustn't; borrow