It is not failure itself but the attitude we have towards it matters.
A. which
B. what
C. that
D. as
网友回答
A. which
B. what
(答案→)C. that
D. as
解析：考查强调句型。强调句型的基本结构为：it is/was被强调成分that/who其它成分；强调句型最大的特点是把it is/was…that/who..去掉以后，句子仍然成立。本题强调的是not failure itself but the attitude we have towards it，句意：重要的不是失败本身，而是我们面对失败的态度。故C正确。