北京市委、市政府提出“首都经济”概念的时间是（）。

A．“七五”时期

B．“八五”时期

C．“九五”时期

D．“十五”时期

At present, some rare wild animals are _____ at a _____ speed. [ ]

A. dying out; surprising

B. died out; surprised

C. die out; surprise

D. being died out; surprising