— There must be a dozen pens in the room,but I can never find one when I need them.

— Keep looking. _____ is sure to turn up. [ ]

A. One

B. It

C. That

D. This

大手术后下列哪一叙述是错误的（）。

A.水钠潴留多见

B.尿量减少

C.补液常不足

D.抗利尿激素分泌多

E.应激反应明显