摘要：12．The student in the games on the MP4 during class didn’t notice his teacher behind him. A．absorbing B．to absorb C．be absorbed D．absorbed 答案 D 解析 那个课上全神贯注于MP4上的游戏的男孩没有注意到他身后的老师.be absorbed in全神贯注于--.专心于--.是过去分词词组作后置定语.

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