---- Could you please sweep the floor?
---- _______. I am busy looking after my sister.
| A．Sorry, you can’t. | B．Yes, sure. |
| C．Yes, I am. | D．Sorry, I can’t. |
---- Could you please sweep the floor?
---- _______. I am busy looking after my sister.
| A．Sorry, you can’t. | B．Yes, sure. |
| C．Yes, I am. | D．Sorry, I can’t. |
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