单选题
The development of industry has (also) brought (about) large numbers of problems (which) have (to solve).
【正确答案】
D
【答案解析】[解析] 应改为to be solved，因为solve和它的逻辑主语之间是动宾关系。例如：Everyone likes the hero to be praised.(每个人都喜欢英雄得到表扬。) Nothing is allowed to be taken out of the building. (任何东西都不能被拿出这座大楼。)