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Since the early 1990s, conservationists have______protecting the Amazon in part because of its abundance of plant and animal spe
Since the early 1990s, conservationists have______protecting the Amazon in part because of its abundance of plant and animal spe
admin
2012-10-22
29
问题
Since the early 1990s, conservationists have______protecting the Amazon in part because of its abundance of plant and animal species.
选项
A、called forth
B、called back
C、called up
D、called for
答案
D
解析
四个选项的意思分别是:call forth使产生,引起,使起作用;call back叫回来,收回,打回电;call up召唤,使想起,提出;call for要求,提倡,为……叫喊。句意是,由于植物和动物物种丰富,自从20世纪90年代起,环境保护论者就一直呼吁保护亚马逊丛林。
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