Daniel never does his homework Mary so he often makes some mistakes.A. so careful asB. as

问题补充：

Daniel never does his homework Mary, so he often makes some mistakes.

A. so careful as

B. as carefully as

C. carefully as

D. careful as

答案：

A. so careful as

(答案→)B. as carefully as

C. carefully as

D. careful as

解析：as…as…像···一样···，not as/so…as…，不像···一样···，同级比较中间加形容词或副词的原级。形容词用来修饰名词或放在系动词后做表语，副词多用来修饰动作说明动作的方式。结合句意：丹尼尔从来就不像玛丽一样认真做作业。所以他经常犯错误。故选B。