填空题

【参考答案】

改because为because of。
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单项选择题
21 In order to get the fall benefits of automation, labor will depend mostly on
A．additional payment to the permanently dismissed workers
B．the increase of wages in proportion to the increase in productivity
C．shorter working hours and more leisure time
D．strong drive for planning new installations
单项选择题
It can be inferred from the third paragraph that earlier generations didn’t realize
A．the interdependence of water, soil, and living things
B．the importance of the proper use of land
C．the harmfulness of soil destruction and river floods
D．the extraordinarily rapid growth of population
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