“市井经济之家……夜市直至三更尽，才五更又复开张。如要闹去处，通晓不绝…”。材料反映的现象发生在

A．秦都咸阳

B．汉都长安

C．隋都长安

D．宋都东京

-Why was professor Liu thundering in    the classroom yesterday?    

-A student's interrupting his speech ____  the burst of hisanger.      [ ]

A. set up  

B. set out    

C. set about                        

D. set off