If dinosaurs were still __alive___,they would be the biggest __living___crestures in the world.
alive,living
这两个词都表示“活着的”、“有生命的”（having life）意思,词义相同,但用法有所不同.
Alive是表语形容词,放在verb“to be”之后,不能放在它所说明的名词之前.例如我们只可以说 The old man is still alive.
Living既可用作表语形容词,又可用作定语形容词,故可放在它所修饰的名词之前.
我们既可以说：
English is a living language．现存的的意思.
也可以说：
Is his father still living?
就使用场合而言,alive大都用于人,有时用作比喻或强调时也用于物.例如：
Given the chance to sing on stage,he is very much alive．
有机会在台上唱歌,他显得很活跃.
The bazaar was all alive by the time we arrived．
我们到达时,墟市非常热闹.