While ________ a bike, he was careless and ________ into a car on the roadside.
A.riding; was knocked
B.riding; knocked
C.was riding; was knocked
D.was riding; knocked
对258人提供帮助
While ________ a bike, he was careless and ________ into a car on the roadside.
A.riding; was knocked
B.riding; knocked
C.was riding; was knocked
D.was riding; knocked
对258人提供帮助