患者，男，44岁，车祸致复合伤，抗休克处理后，循环稳定，但突然出现呼吸困难，吸纯氧未见改善。检查：发绀，肺部无啰音，胸透无异常。应首先考虑（）。

A.输液过量

B.肺栓塞

C.吸入性肺炎

D.急性呼吸窘迫综合征

E.支气管痉挛

— What do you think we do now?

— I think it is time that you _____ down to something.

[      ]

A. will get

B. get

C. got

D. would get