Greenhouses________nearcoastscan

发布时间：2020-07-28 04:51:38

Greenhouses ________ near coasts can turn plentiful sea water into fresh water for crops at relatively lower costs．A.are builtB.builtC.to have been builtD.having been built

网友回答

B
以上问题属网友观点，不代表本站立场，仅供参考！