Labor Market DeclineThe decline

Labor Market Decline
The decline of the labor market is easy to misinterpret （interpret）. There are many reasons for that. During the 1970s, large numbers of women and young adults __1___ （bear） during the baby boom entered into the work force. That ___2___ （result） in too many workers for the jobs available and depressed wages. The decline also has something to do with the explosive ___3___ （grow） in world trade since 1960. As ___4__ （manufacture） technologies have become more mobile, production jobs have __5___ （move） from the U.S. to countries where wages are low. In ___6___ （add）, technology itself has helped to cause the shifts in the job market. For example, ___7____ （few） American workers are needed to make steel today than in the past, because new ____8___（machine） have made many of their tasks ___9___ （necessary）. Finally, the high rate of ____10____ （employment） caused by these factors has tended to drive wages down further.

5___.
【正确答案】：moved
【题目解析】：have+动词过去分词构成现在完成时，答案是moved