| Newton was playing under an apple tree an apple fell onto his head. |
A. when B. while C. after D. before |
科目：初中英語 來源：山東省期中題 題型：單選題
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科目：初中英語 來源： 題型：
Newton was playing under an apple tree _____an apple fell onto his head.
A．when B．while C．after D．before
科目：初中英語 來源： 題型：
Newton was playing under an apple tree____ an apple fell onto his head.
A. while B. when C. before
科目：初中英語 來源： 題型：
Newton was playing under an apple tree an apple fell onto his head．
A．when B．while C．after D．before
科目：初中英語 來源：2008年山東省東營市初中畢業升學統一考試、英語試卷 題型：016
Newton was playing under an apple tree ________ an apple fell onto his head．
A．when
B．while
C．after
D．before
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