.---Why were you not at the concert last night ?
---Oh.I ______ for a friend from Europe at the airport.
| A．watched | B．have been watching |
| C．was watching | D．had watched |
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.---Why were you not at the concert last night ?
---Oh.I ______ for a friend from Europe at the airport.
| A．watched | B．have been watching |
| C．was watching | D．had watched |
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