Theworldpopulationisexpectedtorisetomorethanninebillionby2050,one-thirdofallpeople______expectedtoliveincities。
A.has been B.are C.have been D.have succeeded in正确答案B
Theworldpopulationisexpectedtorisetomorethanninebillionby2050,one-thirdofallpeople______expectedtoliveincities。
A.has been B.are C.have been D.have succeeded in正确答案B