单选题 Bob believes that the invasion of the marketplace into the university is undermining fundamental academic values, and that we must act now to halt this decline.
【正确答案】 C
【答案解析】[解析] halt“阻止”。 lace“用花边、饰带装饰”；plug“嵌入、插入”；cease“停止；终了”；digest“消化”。