-I wonder why Mr Green hasn’t showed up at the meeting yet.

-I’m not sure, but he _______ in a traffic jam driving here.

A．could be stuck

B．might stuck

C．might have been stuck

D．must have stuck

可有效预防本病且改善肾功能的方法是

A．积极有效治疗高血压

B．无需特殊处理

C．透析治疗

D．积极治疗肾脏病

E．适当补充尿中丢失的营养成分