13._________his size, I guessed that he was a basketball player.  

A．To judge from

B．Having judged by

C．Judging from

D．Judged by

有人说：“隋朝：犹如一颗流星划过历史的天空，时间虽然短暂却光芒四射”下列对“流星”的理解，正确的是

A．繁荣而短暂

B．实现了一统

C．统治者残暴

D．大运河开通