-Hello, Jenny. Your box looks so heavy. Let me give you a hand.
-_______I'm OK.
| A．That's all right. | B．No, thanks. |
| C．Well done. | D．You are welcome. |
-Hello, Jenny. Your box looks so heavy. Let me give you a hand.
-_______I'm OK.
| A．That's all right. | B．No, thanks. |
| C．Well done. | D．You are welcome. |
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