Hebrokehislegswhile＿＿＿＿＿A.ridingB.r

发布时间：2020-07-10 23:18:48

He broke his legs while ＿＿＿＿＿













A.riding












B.ride











C.was riding











D.rode

网友回答

A解析while riding＝while he was riding
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