Newton was sitting under an apple tree ______ an apple fell onto his head. A．whe
题型：不详难度：来源：
Newton was sitting under an apple tree ______ an apple fell onto his head. | A．when | B．while | C．after | D．before |
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答案
| A |
解析
| 本题考查连词辨析。此处when作并列连词,表示“就在此刻(and justthen)”“,突然(and suddenly)”。 |
举一反三
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