问题补充：
The driver drove hit at a big tree and the car came to a stop.
A. too carelessly to
B. carelessly enough to
C. so carelessly that he
D. so careless that he
答案：
A. too carelessly to
B. carelessly enough to
(答案→)C. so carelessly that he
D. so careless that he
解析：句意：司机开车不够认真撞到了树，车停了下来A太不认真而不能做...B足够不认真去做...C如此不认真以至于....carelessly副词，可以修饰动词driveD如此不认真以至于careless形容词，可以修饰名词。too+adj/adv+todo sth太...样而不能。so+adj/adv that从句，如此...以至于。adj/adv enough to do sth足够...样去做某事。
