Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation, acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's). [A]
(A) acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate
(B) acting as a global thermostat and thus keeping Earth either from burning up or freezing over, while also accelerating
(C) act as a global thermostat and thus keep Earth from either burning up or freezing over, while also accelerating
(D) they act as a global thermostat that thus keeps Earth either from burning up or freezing over, even though it also accelerates
(E) they act as a global thermostat to thus keep Earth from either burning up or freezing over, but they also accelerate
对于E选项的to thus keep earth,prep语法笔记上解释说:thus副词不能连接并列的谓语act,keep(应将to改为连词and)
我的看法是,act和keep是有一种承接因果关系,所以改为act as a global thermostat to keep应该是可以的,这里错是错在不定式中间是不能加东西的,而这里加了thus。至于to是否要改为thus不是根本问题。
另外想问一下 act as sth. to do这样的搭配正确吗?
what about:
Let us wait and see.
no one say 'Let us wait to see'
Hi,aeoluseros
什么叫“目的性语气的强加”?
E的问题在于破坏句子主干:although...(benefit), they (another benefit)... but (destruction)...,
感觉是although和they是同一个高度
A选项强调了:although...(benefit) acting (another benefit)..., they (destruction)...
正确的将although的好处和destruction的坏处进行对比,句子的平衡性更好
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