Agoodmanytrees____inthispartoft

发布时间：2020-07-25 22:35:45

A good many trees ____ in this part of the country by the end of last year.A.have been plantedB.had been plantedC.would be plantedD.were planted

网友回答

B解析by意思为“到……以前”，用过去完成时
以上问题属网友观点，不代表本站立场，仅供参考！