肠瘘最常见的电解质紊乱是（）

A.低钾、低钠

B.低钾、高钠

C.高钾、高钠

D.高钾、低钠

E.低钾、钠正常

—I have not finished with my dinner yet.

—But our friends ______ for us.

A．will wait

B．wait

C．have waited

D．are waiting