14.16.A.When they're 6.
B.When they're 10.
C.When they're 12.
17.A.Because they have to study from Monday to Friday.
B.Because they want to play from Monday to Friday.
C.Because they have nothing to do on weekends.
18.A.Cook dinner for the family.
B.Cut grass and wash the car.
C.Feed the family cat or dog.
19.A.Because they want to give the younger ones more candy.
B.Because they want to get more money.
C.Because they want to have more candy.
20.A.Getting money is not easy.
B.Doing chores takes time.
C.Doing chores is good for kids.
分析 略
解答 16.B 17.A 18.C 19.B 20.C
点评 略