___ one's work properly may be worse that not doing it at all.

D

做这样的题注意平行结构 即前后表达方式要一致
所以答案自然选D

D

做的不好,还不如不做.

选择not doing 是与that 后的doing 保持一致的缘故.

D与后面的doing相配，还有与句意相符

Not doing one's work properly may be worse than not doing it at all.
与其滥笙充数，还不如不做。