A.the most affluent.
B.the best educated.
C.the most optimistic.
D.the healthiest.


A.In the late 1970s.
B.In the early 1970s.
C.During World War II.
D.In the late 1960s.
A.85.
B.1,924.
C.2,500.
D.25,000.
A.Highlights.
B.Low points.
C.Changes.
D.High points.