----I was riding along the street and all of a sudden a car cut in and knocked me down.--

问题补充：

----I was riding along the street and all of a sudden, a car cut in and knocked me down.

------You can never be careful in the street.

A. much

B. very

C. so

D. too

答案：

A. much

B. very

C. so

(答案→)D. too

解析：考查固定用法。Can not..too..再…也不为过…；句意：—我正在街上骑车突然一辆汽车撞倒了我、。—在街上，你再怎么小心也不为过。故D正确。