Question

____ is known to all, persistence is a kind of quality and that’s ____ it takes to do anything ..

____ is known to all, persistence is a kind of quality and that’s ____ it takes to do anything well. A．As; which B．It; which C．It; what D．As; what

Answer 1

D
句意：众所周知，坚持不懈是一种品质，是我们做任何事都需要的品质。as
is
known
to
all,
众所周知，相当于
It
is
known
to
all
that....
what引导表语从句，做take的逻辑宾语。which在从句中的意思是哪一个。由句意可知选D。
考点:
考查代词的用法。