—Do you know ________ Simon is?
—I met him in the school library just now. He may be still there.
| A．how | B．who |
| C．where | D．what |
—Do you know ________ Simon is?
—I met him in the school library just now. He may be still there.
| A．how | B．who |
| C．where | D．what |
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