is no doubt John’s knowledge of first aid saved Ms Slade’s life.A. It; thatB. It; whichC

问题补充：

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

答案：

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