阅读下题，根据括号内的汉语提示完成句子。

Thus, they have, ________　________　________(轮到他们), became the most important animals on the planet．

阅读下题，根据括号内的汉语提示完成句子。

Thus, they have, _________　_________　_________(轮到他们), became the most important animals on the planet．