Evidence has been piled up drinking water before breakfast is good for our health.
A. what
B. which
C. if
D. that
网友回答
A. what
B. which
C. if
(答案→)D. that
解析：考查同位语从句。That引导drinking water before breakfast is good for our health解释Evidence的内容。句意：早饭前喝水对我们身体好的证据有很多。