It was ___he was ill that day ____ he knew nothing about the accident

题目

It was ___he was ill that day ____ he knew nothing about the accident
A as which B because that C since when D for why

答案

B 这是一个强调句（It is..that..) 其中 It is跟that 之间的成分即是被强调的部分 强调句最大的特点是将It is还有that去掉后 整句话依然成立~
因此 这句话去掉强调结构 即 Because he was ill that day,he knew nothing about the accident.因为那天他生病了,因此对事故他全然不知~
意思上符合逻辑 所以选B