The new technological revolution in American newspapers has brought increased _______, a wider range of publications and an expansion of newspaper jobs.

　　A) circulation

　　B) reproduction

　　C) manipulation

　　D) penetration

　　注：1. circulation 循环;发行量

　　2. reproduction 复制;生殖

　　3. manipulation 操纵，控制(永陪词汇)

　　4. penetration 渗透，弥漫

　　permeate 渗透，弥漫

　　permanent 永恒的，永久的

　　potential 潜力

　　His career was not noticeably ______by the fact that he had never been to college.

　　A) prevented

　　B) restrained

　　C) hindered

　　D) refrained

　　注：1. hinder 阻碍

　　2. restrain = refrain 限制，抑制