4．Tom told me that after a few years in China not only____his Chinese, and that he had also obtained more interest.

A．does he improve

B．had he improved

C．he had improved

D．he will improve

男，35岁。突发呼吸困难伴窒息感，查体；呼吸30次／分，呼气延长，双肺哮鸣音，无湿啰音。

男，35岁。突发呼吸困难伴窒息感，查体：呼吸30次／分，呼气延长，双肺哮鸣音，无湿啰音，该患者可能的诊断的是（）。

A.自发性气胸

B.支气管哮喘

C.急性左心衰竭

D.气管异物

E.肺气肿