is no doubt John’s knowledge of first aid saved Ms Slade’s life.
A. It; that
B. It; which
C. There; that
D. What; that
网友回答
A. It; that
B. It; which
(答案→)C. There; that
D. What; that
解析：固定句型there is no doubt that…毫无疑问的是… 句意为：毫无疑问的是，约翰的急救方面知识救了斯莱德女士一命。doubt在这里作名词“疑问、怀疑”；that引导同位语从句，解释说明怀疑的内容。A 不行只有it is no wonder that 难怪