. The magician picked several persons from the audience and asked them to help him with the performance.
| A．by accident | B．on occasion |
| C．at random | D．on an average |
—Hey, can I ask you a favor?
—Sure, ________
| A．here you are. | B．just as I thought. |
| C．how is it going? | D．what can I do for you? |
—How far can you run without stopping?
—________. I've never tried.
| A．Don't mention it | B．That's all right |
| C．I have no idea | D．Go ahead |
—How would you like your coffee?
—________.
| A．It's well done |
| B．Very nice. Thank you |
| C．One cup. That's enough |
| D．The stronger, the better |
—How about going out for a break?
—________. We've been working for three hours.
| A．Take your time | B．It's my pleasure |
| C．Come on | D．I totally agree |
—I've got something weighing on my mind. Could you give me some advice?
—________. Tell me all about it and I'll do what I can.
| A．Don't mention it | B．No way |
| C．No problem | D．Forget it |