—We were surprised to hear that the reason she gave for her absence was her mother was ill.
—Yes.We saw her mother was at the supermarket that morning.
A. why；that
B. which；that
C. that；because
D. why；because
网友回答
A. why；that
B. which；that
C. that；because
D. why；because
解析：B
解析 第一空可填which或that来引导定语从句，而第二空的表语从句必须用that引导。