例题讲解

How does water scarcity affect people? First of all，it 41 their health．It is not that they will die of thirst；rather，the poor quality of the water  42   for cooking and drinking may make them ill．

 

    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.