女性，29岁，上呼吸道感染后1周出现浮肿、尿量减少、关节炎，化验血Ilb9．8g/dl，尿蛋白（+++），RBC5～10个／HP，WBC5～8个／HP；血补体C3下降，血肌酐120μmol／L，AS01：400，ANA（+）。

最可能的诊断为（）

A.急性链球菌感染后肾炎

B.IgA肾病

C.慢性肾炎急性发作

D.狼疮性肾炎

E.急性间质性肾炎

—Sorry, I don't know what the teacher said just now.

—He asked Maria _____.[ ]

A. how long she usually spends on her homework

B. what she was doing these days

C. why didn't Mike come to the meeting yesterday

D. when the speech will begin