【题目】As is estimated, more than 20 million shared bikes ______ into operation nationwide by 2025.
A.will have been putB.will have putC.have been putD.will be putting
在线课程【答案】A
【解析】
考查动词时态语态。句意：据估计，到2025年为止，全国将有2000多万辆共享单车投入运营。根据by 2025可知应用将来完成时，且主语与谓语动词构成被动关系，故应为将来完成时的被动语态。故选A。