--- 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; lend |
--- 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; lend |
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