determination is a kind of basic quality and is ( )it takes

Determination is a kind of basic quality and is ( )it takes to do jobs well.
答案：A.what
首先分步理
1.Determination 有两个并列的谓语动词,拆分以后可以看出：
Determination is a kind of basic quality.果断是一种基本素质
Determination is what it takes to do jobs well.果断是做好工作的所必需的素质.
2.第二个谓语动词 is 带有表语从句 what it takes to do jobs well.
3.表语从句的主语是不定式 to do jobs well,it 是形式宾语.
4.what it takes 中的 what 是关系代词型连接词,等于 the quality that,相当于汉语的“所...的素质”,此句也可以改写为“先行词+关系代词”引导的定语从句 the quality that it takes to do jobs well.

选what 这是表语从句,且to do jobs是主语,takes缺少宾语.后半句意思是决心是做好工作所须的.