Whenever he was asked why he was late for class，he  would answer carelessly，______ the same thing.

A．saying

B．said

C．to say

D．say

急性弥漫性毛细血管内增生性肾小球肾炎包括的病变（）

A.肾小球见中性白细胞浸润

B.系膜细胞增生

C.肾小球球囊的壁层和脏层上皮细胞可增生

D.大量淋巴细胞浸润

E.内皮细胞增生