—You were out when I dropped in at your house yesterday.
—Oh, I________ for a friend from Beijing at the railway station.
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 yesterday.
—Oh, I________ for a friend from Beijing at the railway station.
A.was waiting | B.had waited | C.am waiting | D.have waited |