It is not a wise idea for teenagers to have to work hard．Some parents ask their children to 1 money by doing odd jobs．Teenagers should 2 in school as hard as they can．They should not have to do 3 work with their bodies．When teenagers have to work hard 4 the stress of their parents or others, the 5 are never good and may be very bad．A farmer's child who has to work like a man may 6 learn to hate farming．Teenagers sometimes do too 7 in factories, in shops, in restaurants or even in their own homes．It causes a lot of problems．Teenagers will lose their parents' support and understanding．It's bad for their health．They soon begin to hate such work with a force that can destroy(破坏)their happiness．But there may be a worse 8 ：a child's love for it's parents．The feeling may 9 something different．When that 10 the old kind of love never return．
D. happened