Once _____ in a theater wearing 3D glasses, you feel as though you are caught up in the story which is showing around you.

A．seated

B．be seated

C．to sit

D．have been sitting

此患者最可能的诊断是

A．支气管哮喘

B．支气管扩张

C．慢型喘息型支气管炎

D．慢性支气管炎急性发作期

E．慢性阻塞性肺气肿