题目内容

He had been so absorbed____ watching the car passing by that he didn’t notice his friends ____.
A．to; comingB．in; to comeC．on; comingD．in; coming
D
考查固定结构。Be absorbed in doing sth，全神贯注于……；notice sb doing sth.注意到某人正在做某事。所以选D。
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