Perseverance is a kind of quality- and that’s it takes to do anything well. A. whyB. t

问题补充：

Perseverance is a kind of quality --- and that’s it takes to do anything well.

A. why

B. that

C. which

D. what

答案：

A. why

B. that

C. which

(答案→)D. what

解析：考查表语从句：句意：坚持是一种品质，这是把事情做好必须的。Is后面是表语从句，take后面是缺少宾语，用what引导表语从句。选D。