摘要：15． -You were out when I dropped in at your house． -Oh, I for a friend from England at the airport． A．was waiting B．had waited C．am waiting D．have waited
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— You were out when I dropped in at your house．
— Oh,I ________ for a friend from England at the airport．
[ ]
A．was waiting
B．had waited
C．am waiting
D．have waited
－You were out when I dropped in at your house.
－Oh, I ________ for a friend from England at the airport.
[ ]
A．was waiting
B．had waited
C．am waiting
D．have waited
— You were out when I dropped in at your house.
— Oh, I _______ for a friend from England at the airport.
A．was waiting B．had waited C．am waiting D．have waited
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