—Mr. Green, can you spare me a few minutes? I still have some questions about your assignment.
—________.
| A．It's a pleasure | B．Not at all |
| C．Help yourself | D．Sure, go ahead |
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—Mr. Green, can you spare me a few minutes? I still have some questions about your assignment.
—________.
| A．It's a pleasure | B．Not at all |
| C．Help yourself | D．Sure, go ahead |
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