Breathing dirty air causes the premature death of at least 1,200 children across Europe each year. Actually, many thousands more ________________ (trouble) with physical and mental health problems that could have lifelong impacts. （所给词的适当形式填空）
So far, through the remote video monitoring system and the use of BDS and other equipment, the intelligent and informationbased threedimension system of the “sky and ground” for biodiversity protection ________________ (establish). （所给词的适当形式填空）
I am sure you know something about Tai Chi. The fluid combination of slow, graceful movements and lightningquick strikes easily ________________ (set) Tai Chi apart from other martial arts. （所给词的适当形式填空）
Investigating the way that dragonflies remain stable during flight actually ________________ (reveal) the techniques they use to get themselves out of tricky situations. (所给词的适当形式填空)
Behind Zibo’s sudden fame ________________(be) the efforts and services of the local government, as well as a good reputation of local businesses, which receive favorable reviews from visitors who share their experiences online. (所给词的适当形式填空)
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