问题补充:
单选题Theairpollutionofthecity____by20percentthankstothestrictmeasurestakenbythegovernment.A.has been fallen downB.has been increasedC.has been reducedD.has been risen
答案:
C
时间:2021-09-07 07:38:30
单选题Theairpollutionofthecity____by20percentthankstothestrictmeasurestakenbythegovernment.A.has been fallen downB.has been increasedC.has been reducedD.has been risen
C