阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。The Dongjiang River in southern China provides drinking water for 40 million people, including those in Hong Kong and rural areas. However, this vital resource had become (critical) threatened by sewage (污水). With continuous polutant emissions, it no longer qualifies a safe source of drinking water.To address this challenge, a nature-inspired system which harmonizes (engineer)practices and nature's wisdom was put into place. This system, which 39 (function)similarly to wetlands in purifying water, is low both in cost and maintenance. These artificial ecosystems, polutants are absorbed and broken down, are highly effective. Compared to conventional methods, they are much (efficient) in reducing pollution.The project also provides inviting habitat for local wildlife, including fish, frog and insects. Since the project began, residents (see)a steady rise in the amount of wildlife in the area.This innovation makes itself (recognize) as a model of innovation in environmental conservation. By adopting nature-inspired strategies, it offers (insight)solutions to preserve the local ecosystems and promote sustainable development at the same time.
答案:【1】critically【2】as【3】engineering【4】functions【5】where【6】more efficient【7】an【8】have seen【9】recognized【10】insightful