摘要：980] My brother while he his bike and hurt himself. [译文] 我弟弟骑自行车时摔了下来.伤了他自己. A. fell; was riding B. was breaking; was playing C. broke; wa playing D. was playing; broke [答案及简析] A. fall是瞬间动词.while引导的从句一般是进行时态.

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