They were ______ in their scientific research, not knowing what happened just outside their lab.

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问题 They were ______ in their scientific research, not knowing what happened just outside their lab.

选项 A、impaired
B、immersed
C、ignited
D、induced

答案B

解析 动词辨义。这四个选项都是过去分词,impaired表示“损害;使弱”;immersed表示“沉浸;陷入”,常与in连用,be immersed in sth.表示“沉浸于/沉溺于某事”,如:The professor was so immersed in her work that she didn’t notice me.(教授在专心致志地工作,以致没注意到我。)ignited意指“点火,点燃”,如:His enthusiastic speech ignited the audience.(他那热情的讲话使听众激动起来。)induced表示“劝诱,促使,导致,引起,感应”,如:What induced you to do such a foolish thing?(是什么引诱你做这样的傻事?)根据句意,科学家们专心于工作,所以B)项符合题目要求。
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