___ the front door ___, he had to enter the room through the back door.
| A．Seen; painted | B．Seeing; painted |
| C．Being seen; being painted | D．Seeing; being painted |
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___ the front door ___, he had to enter the room through the back door.
| A．Seen; painted | B．Seeing; painted |
| C．Being seen; being painted | D．Seeing; being painted |
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