阅读下列短文,根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词,在给出提示词的空白处用括号内所给词的正确形式填空。
Probably one of the most beneficial (innovation) is drip irrigation, which has made possible to develop big, green farms in the middle of the desert. there have been experiments in different places in the past to make drip irrigation a reality, it is in the Middle Eastern country of Israel that drip irrigation has become a modern success.
答案:【1】innovations【2】it【3】While/Although/Though