Ⅲ．听短文，选答案．
16．When do children in Western countries usually start to do chores to get money？
A．When they're 6．
B．When they're 10．
C．When they're 12．
17．Children do chores only on weekends because___．
A．they have to study from Monday to Friday
B．they want to play from Monday to Friday
C．they have nothing 10 do on weekends
18．Which of the following do younger kids often do？
A．Cook dinner for the family．
B．Cut grass．
C．Feed t he family cat or dog．
19．Older kids have to do more chores to___．
A．give the younger Ones more candy
B．get more money
C．have more candy
20．The writer wants to tell us that___．
A．getting money is not easy
B．doing chores-takes time
C．doing chores is good for kids．