—She ______ in public.

—Oh, she is a shy girl. [ ]

A. dare not speaking

B. doesn't dare speak

C. dare not speak

D. dare not to speak

男，47岁，因呕吐、腹泻、低热于门诊应用庆大霉素40万U/d，共4天，近日来觉尿量有所减少约700～800ml/d，伴乏力、头晕，实验室检查尿蛋白（+），Hb100g/L，血清钾7．0mmol/L，BUN33.5mmol/L。血肌酐884μmol/L。

最有助于诊断的进一步检查是（）

A.肾脏B超

B.静脉肾盂造影

C.同位素肾图

D.肾活检

E.血气分析