36．       Chicago Public Schools began to employ foreign teachers because        .

A．there were not enough American teachers

B．a program for foreign teachers was started

C．the school board was interested in foreign teachers

D．foreign teachers taught better than American teachers

37．The American Government is involved in the program because        .

A．the schools are public schools

B．the Government is to finance the program

C．the Government grants visas to the foreign teachers

D．the program involves bilingual education

38．It seems that the Global Educator Outreach will        .

A．be difficult to continue

B．last a limited period of time

C．pose a threat to U.S. workforce

D．be extended to other cities

39．Chicago Public Schools do not seem to lack teachers of        .

A．English                  B．math                      C．science                  D．world language

40．Hannon, as a GEO teacher, has found that        .

A．class schedules in America and Palestine are very much the same

B．fixed class schedules make it easy for teachers to prepare lessons

C．vocational schools offer a good career option for American students

D．American students do not work as hard as Palestinian students

Passage Three

Workforce is defined as the total number of people who are available to work and earn incomes. The definition includes everyone who is employed or seeking paid employment, so it includes employers and the self-employed.

Although the size of the workforce depends a great deal on the size of the total population, there are several other influences which also affect it. The age distribution of the total population has a very marked effect on the available workforce. If the population has a high proportion of very young people or of those too old to work, then the available workforce would be lower than if there were an evenly spread age distribution. If the population grows rapidly from natural increase, i.e., the number of births greatly exceeds the number of deaths, then as the total population increases, the proportion in the workforce declines.

Sometimes a population is described as aging, which means that the birth rate is either falling or growing very slowly, and as people retire from the workforce, there are not enough young people entering it to replace those who are leaving it. The population is top-heavy with older people. So the percentage of the population in the workforce declines when there is either a rapid increase in births or a falling birth rate.