单选题
1. "How long had you been waiting before Mr. Winter finally arrived?""Well, he came at three o'clock, and I ( ) the day before."
A
had waited after
B
had been waiting since
C
was waiting from
D
had been waiting for
答案解析
正确答案:B
解析:
解析:等某人 wait for sb.解析:for接一段延续的时间,since接过去时间状语或过去时句子。
