— I called you yesterday evening. But nobody was in.

— Sorry, I _____ with parents in the park. [ ]

A．take

B．took a walk

C．was taking a walk

D．are taking a walk

先天性心脏病动脉导管未闭可出现以下症状，但除外（）

A.气急、咳嗽

B.乏力、多汗

C.心悸

D.声音嘶哑

E.缺氧发作