__________ did your uncle leave his hometown ?
He _________ for nearly 20years .
| A．When , has left | B．When , has been away |
| C．How long , has left | D．How long , has been away |
__________ did your uncle leave his hometown ?
He _________ for nearly 20years .
| A．When , has left | B．When , has been away |
| C．How long , has left | D．How long , has been away |
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