—I’m sorry to have kept you waiting.

—Oh, not at all. I ______here for only a few minutes.

A．have been

B．had been

C．was

D．will be

胸片上，双侧肺门影增大可见于（）

A.大叶性肺炎

B.慢性纤维空洞型肺结核

C.法洛四联征

D.慢性肺源性心脏病

E.肺隔离症