下面的短文有10处空白,每处空白后的括号内有一个词,请根据短文内容将其正确的形式填入文中,以恢复文章原貌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 （41）(bear) during the baby boom entered into the work force. That （42）(result) in too many workers for the jobs available and depressed wages. The decline also has something to do with the explosive （43）(grow) in world trade since 1960. As （44）(manufacture) technologies have become more mobile, production jobs have （45）(move) from the U.S. to countries where wages are low. In （46）(add), technology itself has helped to cause the shifts in the job market. For example, （47）(few)American workers are needed to make steel today than in the past, because new （48）(machine) have made many of their tasks （49）(necessary). Finally, the high rate of （50）(employment)caused by these factors has tended to drive wages down further.