题目内容
| Newton was playing under an apple tree an apple fell onto his head. |
A. when B. while C. after D. before |
试题答案
A
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Newton was playing under an apple tree an apple fell onto his head.
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B. while
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Newton was playing under an apple tree _____an apple fell onto his head.
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查看习题详情和答案>>Newton was playing under an apple tree____ an apple fell onto his head.
A. while B. when C. before
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