Question

The students       their pens when the teacher told them to stop writing.
A. turn down                    B. put down             C. put off

Answer 1

B

试题分析： A. turn down调小，关小，调低，B. put down镇压，放下，贬低，停止，C. put off推迟，扔掉，阻止，stop doing sth.停止正在做的事儿，句意：当老师告诉学生们不要写了，他们都放下手中的笔。故选B。