完型填空練習

Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (21) ____ on the individual suggest that children engage in criminal behavior (22) ____ they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (23) ____ with others. Theories focusing on the role of society that children commit crimes in (24) ____ to their failure to rise above their socioeconomic status (25) ____ as a rejection of middle-class values.
Most theories of juvenile delinquency have focused on children from disadvantaged families, (26) ____ the fact that children from wealthy homes also commit crimes. The latter may commit crimes (27) ____ lack of adequate parental control. All theories, however, are tentative and are (28) ____ to criticism.
Changes in the social structure may indirectly (29) ____ juvenile crime rates. For example, changes in the economy that (30) ____ to fewer job opportunities for youth and rising unemployment (31) ____ make gainful employment increasingly difficult to obtain. The resulting discontent may in (32) ____ lead more youths into criminal behavior.