Economists believe that job earnings influence choice of occupation. They acknowledge that

people place varying emphasis __11__income, but point out that workers tend to move from one occupation to another __12__changes in salaries.

In 1931, H.F.Clark, an economist, stated that “proper information regarding wages if sufficiently __13__ upon people, will lead to correct choice of occupation and correct __14__ of people in an occupation, provided barriers to occupations have been removed.” This means that the supply and demand of workers have __15__to do with wages, __16__in turn influence people to choose certain careers.. However, all barriers to occupations will have to be removed __17__ career choices can be __18__ by economics alone.

There is little question __19__economic factors have some influence on choice of an occupation. But to picture them as the major or most important reason __20__ against the soundest of folk wisdom:“Man does not live by bread alone.”

11、_________

A.in

B.on

C.into

D.for

12A.despite

B.other than

C.through

D.because of

13A.to impress

B.to be impressed

C.impress

D.impressed

14A.number

B.amount

C.deal

D.quantity

15A.many

B.much

C.lot

D.nothing

16A.it

B.that

C.which

D.where

17A.before

B.after

C.until

D.when

18A.expected

B.explained

C.expressed

D.exposed

19A.that

B.which

C.as

D.when

20A.to go

B.going

C.goes

D.go

请帮忙给出每个问题的正确答案和分析，谢谢！