China’s one-child policy has been in place for decades and is causingageing problem. So the news that China abandons one-child policy is _________ with cheers from many married couples.
It is reported that China plans to__________ its controversial temporary residence permit and push forward reform of the household registration system.
Los Angeles Times reported that researchers may have found a way to _________ human life by changing certain genes, so that humans might expect to live twice as long.