汉译英句型构建 — 英语选择题

请选择最恰当的选项补全译文：“正是通过反复练习，他才能够流利地用英语表达自己的想法。” ______ that he was able to express his ideas fluently in English. A. It was through repeated practice B. Through repeated practice it was C. It is through repeated practice D. Through it was repeated practice