题目内容

My brother _____  to the ground while ____  his bicycle and hurt his leg .
A. falls; is he ridingB. fell; he was riding
C. fall; he is ridingD. felt; was he riding
B

试题分析:句意:我哥哥骑自行车时摔到地上摔伤了腿。while后跟过去进行时,此处主句用过去时,fall的过去式是fell,故选B。
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