thErE ArE thirty sEntEnCEs in this sECtion.BEnEAth EACh sEntEnCE thErE ArE Four worDs or phrAsEs mArkEDA,B,
C、AnD
D、ChoosE onE worD or phrAsE thAt BEst ComplEtEs thE sEntEnCE.
mArk your AnswErs on your AnswEr shEEt.
By thE miDDlE oF thE 21st CEntury, thE vAst mAjority oF thE worlD’s populAtion _______ in CitiEs rAthEr thAn in thE Country.A．ArE living
B．will BE living
C、hAvE livED
D、will hAvE livED