i fell off the bike_A.while riding B.while i am riding C.while i _英语解答

i fell off the bike_A.while riding B.while i am riding C.while i rode选哪

人气：203 ℃　时间：2019-10-23 03:39:13

解答

A.while riding 当主语的人和从句一致时,从句的主语和be动词可以省略