完成句子
He ________to attend the party this evening.
他今天晚上不可能来参加宴会。
I find people busy about their things ________in this city.
我发现这个城市的人们在各忙各的。
Some species of animals have ________because they could not ________a changing environment.
有一些动物已经灭绝了，因为它们不能适应变化的环境。
Many scientists think man  had ________lower forms of life.
许多科学家认为人类是由低级动物进化而来的。
What I've said to him ________all of you as well.
我对他说的那番话，对你们大家都适用。