推 kanei:謝謝兔大! 08/23 17:37
※ 引述《kanei (樂觀一點吧)》之銘言：
: 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. 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
: 答案A，這題我看了半天自己能了解的點只有B的either..or不平衡，還有E的but和
: although意思重覆。Manhattan和其他討論串看了半天還是不了解，煩請大家指點，
: 謝謝!
1. 選項B/C都找不到主要子句主詞動詞,是fragment sentence.
2. 對比關係應該為ice particles benefit earth (+)對比 ice particles accelerate
the destruction of the zone(-), 答案D/E變成和they act as a global thermostat做
對比.
3. D選項的it指代ice particles單複數不一致.
4. 答案B有正確答案長相, 擺在子句後表達因果關係的thus keeping - 水喔！！
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