Theworld'spopulation(人口)ismoreth

发布时间：2020-07-27 19:48:13

The world's population(人口)is more than 7 billion, so scientists will have to ________ new ways to solve food problem．A.catch up withB.keep up withC.e up withD.make up with

网友回答

C
以上问题属网友观点，不代表本站立场，仅供参考！