.This printer is of high quality and very expensive. ________, we would buy __________.

A．Should the price of it be brought down; one

B．If the price of it be brought down; one

C．The price of it was brought down; it

D．Brought down; it

女性，54岁。两年来间断浮肿，加重4周，两天来气短、咯血。体格检查：血压130/86mmHg，腹水征（+）。尿蛋白（++++）（7.5g/d），沉渣RBC3～6个／HP。血清总蛋白49g/L，球蛋白30g/L，甘油三酯2.0mmol／L，抗GBM抗体阴性。双肾大，双肾静脉主干有血栓，胸片肺正常。临床诊断是（）

A.慢性肾炎

B.心功能不全

C.肾病综合征

D.肺栓塞

E.肺肾综合征