考虑最可能的诊断为

A．脑栓塞

B．血管迷走性晕厥

C．心律失常，房颤，脑梗死

D．肥厚梗阻性心肌病

E．心律失常，房颤，短暂性脑缺血发作

--- What are you reading there, Susan?  

--- Nothing interesting. I am just ________ the pages to kill time.

A．turning over

B．turning up

C．turning around

D．turning down