职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:英语知识运用 题类:其他 难易度:较易

    By the time he was 4 years old, he ________ 100 English words.

    A. learns B. will have learned C. has learned D. had learned
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