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