大学英语：efficiency : n 效率，其他同根词

efficiency : n 效率，其他同根词：efficient: a 高效率的;inefficient: a 效率低的;inefficiency : n; effective: a 有效果的

　　1). He has done much to increase the ____ of English teaching.

　　2). She is very _____ in reducing waste.

　　3). His ____ study method caused his failure.

　　4). The city government took some _____ measures to reduce unemployment.

　　Answers: efficiency, efficient; inefficient, effective