--Dad, _______ my teacher, Mr. Smith.
-- Nice to meet you.
-- Nice to meet you, too.
| A．I am | B．you are |
| C．it is | D．this is |
--Dad, _______ my teacher, Mr. Smith.
-- Nice to meet you.
-- Nice to meet you, too.
| A．I am | B．you are |
| C．it is | D．this is |
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