（ ）---------XiaoChen，________ is my friend Mr. White.
----------Hi, Mr. White, nice to meet you!
| A．it | B．It | C．he | D．this |
（ ）---------XiaoChen，________ is my friend Mr. White.
----------Hi, Mr. White, nice to meet you!
| A．it | B．It | C．he | D．this |
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