第二部分：英语知识运用(共两节，满分35分)
第一节 语法和词汇知识（共15小题；每小题1分，满分15分）
21. After he was put into ______ prison, many people joined ______ hands in_____ effort to get him set free.
A. the; their; an B. /; the; the C. a; the; an D. /; /; an
22. The forest guards often find campfires that have not been ______ completely.
A. turned down B. turned over C. put away D. put out
23. We live in a technological society ______ most goods are mass-produced by unskilled labor.
A. when B. where C. how D. while
