The discussion came (alive) when an interesting topic was brought in.The discussion came alive when an interesting topic was brought in.alive的意思是“有生命的,活的,还出气的”为什么填alive,选项还有living ,live,to live我觉得

The discussion came (alive) when an interesting topic was brought in.
The discussion came alive when an interesting topic was brought in.
alive的意思是“有生命的,活的,还出气的”为什么填alive,选项还有living ,live,to live我觉得都不对

alive是形容词,come变得 所以说当一个有趣的话题出现时,议论就又活跃起来啦,也可形容课堂活跃,有生气啊,所以是对的
形容词 a.[F]
1.活着的;现存的[Z]
The injured man is unconscious but still alive.
受伤的人不省人事但仍活着.
2.有活力的,有生气的,活跃的
Although he is eighty,he is still very much alive.
他虽有八十岁了,但仍然充满了活力.
3.敏感的,注意到的[(+to)]
Are you alive to what is going on?
你注意到正在发生的事吗?
4.热闹的;充满的[(+with)]
The town was alive with rumors.
镇上谣言四起.
5.通着电流的
The wire is alive.
这条电线带电.

这里是选alive要用意译变得有活力了

当一个有趣的话题被带入以后，讨论变得热烈/生动起来。
只有alive可以表达这个意思。

come alive是词组，活跃起来，的意思。所以这里考的是词组。