题干
She devoted herself______ to her research and it earned her a good reputation in her field．
A：strongly
B：extremely
C：entirely
D：freely
答案(点此获取答案解析）
C
正确的有①为农村剩余劳动力开辟就业染道 
②促进了第三产业的发展③有力地推动了第三次科技革命的发展 
④是国家垄断资本主义进一步发展的具体表现