题目内容
Tom realized that he ________ his physics book at home when he reached school.
A. left B. had left
C. was leaving D. leaves
B
【解析】
试题分析:句意:当Tom到学校时他意识到他已经把物理书丢在了家里。“意识到”是过去时,“把物理书丢在了家里”发生在过去的过去,即过去完成时。选出正确答案B。
考点:考查动词的时态
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