—Hello，may I speak to John，please？
—________
| A．Who are you？ |
| B．What’s the matter？ |
| C．This is John speaking． |
| D．He is John． |
—Hello，may I speak to John，please？
—________
| A．Who are you？ |
| B．What’s the matter？ |
| C．This is John speaking． |
| D．He is John． |
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