There is no point making complaint of getting low-paid you don’t make any effort at all.

There is no point making complaint of getting low-paid you don’t make any effort at all.
A. until
B. when
C. once
D. though

A. until(答案→)B. whenC. once D. though解析：试题分析: A. until 直到 B. when 当…时候 C. once 一旦 D. though尽管；句意：当你根本没有做出什么努力时，还抱怨低收入是毫无道理的。故选B考点:连词

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