19.The criminal justice system is _______ need _______ urgent reform to prevent more people being wrongfully imprisoned. A. in - of B. on - for C. at - of D. for - Ø 20.Cousins believe that he can meet the _______ of producing shows for different audiences. A. eye B. challenge C. case D. demand 21.Generally the social _______ of female Guardians was higher than male Guardians. A. sitting B. jumping C. walking D. standing 22.The increase in the number of young people leaving to work in the cities has had a dramatic _______ on the demography of the villages. A. consequence B. reduction C. influence D. result 23.My class is doing a project _______ medieval towns. A. on B. over C. among D. at