By the time I was three, I ______ learning English. I've been learning it for fifteen years.
A．had finished B．had stopped C．had started D．had held on to
科目：初中英語 來源： 題型：
By the time I was three, I ______ learning English. I've been learning it for fifteen years.
A．had finished B．had stopped C．had started D．had held on to
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