选词填空
scale , impact , tackle , opponent , sustain , promote , establish , foundation
1.Water and oxygen are basic needs for human beings to ( ) their lives.
2.She is one of the Strongest ( ) of tax reform.
3.I've never seen droughts on such a large () .
4.The priority is to ( ) the problem.
5.The death of his sister has a great ( ) on him.
6.the aim of this campaign is to ( ) sportsmanship in the oncoming competition.
7.he is the chairman of this ( ).
8.the two companies have ( ) a long-term cooperative relationship.
我想请问这八句，各句所包含的语法和词组是什么！还有为什么要填这个词(是否改变词性，为什么会改变？)
注：第一：根据句子意思我已经填了 第1，2，3，4，7题的单词，但我并不知道从 语法上来说，为什么要填这个。所以我怕错了误导你们我就不写出来了。
第二：5，6，8题我不知道该怎么填？还有每一句所含的语法或是每个词的前后搭配等等问题不清楚！
第三：因为老师要提问，我需要详细的解答，我所知道的本人觉得远远不能回答老师的问题！请各位帮帮忙！急！！！！
谢谢！！
scale , impact , tackle , opponent , sustain , promote , establish , foundation
1.Water and oxygen are basic needs for human beings to ( ) their lives.
2.She is one of the Strongest ( ) of tax reform.
3.I've never seen droughts on such a large () .
4.The priority is to ( ) the problem.
5.The death of his sister has a great ( ) on him.
6.the aim of this campaign is to ( ) sportsmanship in the oncoming competition.
7.he is the chairman of this ( ).
8.the two companies have ( ) a long-term cooperative relationship.
我想请问这八句，各句所包含的语法和词组是什么！还有为什么要填这个词(是否改变词性，为什么会改变？)
注：第一：根据句子意思我已经填了 第1，2，3，4，7题的单词，但我并不知道从 语法上来说，为什么要填这个。所以我怕错了误导你们我就不写出来了。
第二：5，6，8题我不知道该怎么填？还有每一句所含的语法或是每个词的前后搭配等等问题不清楚！
第三：因为老师要提问，我需要详细的解答，我所知道的本人觉得远远不能回答老师的问题！请各位帮帮忙！急！！！！
谢谢！！
