—Excuse me. Is the library open all day?
— . Only from 9 a. m to 4 p.m.
| A．Yes, of course | B．That’s right |
| C．Sorry, I’m afraid not | D．Sorry, I’m not sure |
—Excuse me. Is the library open all day?
— . Only from 9 a. m to 4 p.m.
| A．Yes, of course | B．That’s right |
| C．Sorry, I’m afraid not | D．Sorry, I’m not sure |
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