语法与词汇 52.Moreover, judges have the discretion to preclude the use of juries in cases they deem inappropriate, and defendants can choose to be tried by judges alone.
【正确答案】 D
【答案解析】这句话的意思是：此外，法官有权在他们认为不适当的案件中排除使用陪审团，被告可以选择由法官单独审判。画线词preclude意为“阻挡”；prevent意为“阻挡、妨碍”；preserve意为“保持、维护”；precede意为“先于、领先”；include意为“包括”。根据题意，答案为D。