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Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten to warm the Earth’s atmosphere eve
Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten to warm the Earth’s atmosphere eve
admin
2016-10-29
48
问题
Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten
to warm the Earth’s atmosphere even more rapidly than carbon dioxide during the next fifty years
.
选项
A、to warm the Earth’s atmosphere even more rapidly than carbon dioxide during the next fifty years
B、to warm the Earth’s atmosphere even more rapidly over the next fifty years than carbon dioxide will
C、during the next fifty years to warm the Earth’s atmosphere even more rapidly than carbon dioxide
D、a warming of the Earth’s atmosphere during the next fifty years even more rapid than carbon dioxide’s
E、a warming of the Earth’s atmosphere even more rapid than carbon dioxide’s will be over the next fifty years
答案
B
解析
threaten之后一般接动词不定式,D、E的用法不符合表达习惯,且D中than之后未补出助动词;E中的be是错误的,应用do;C中than之后未补出动词,会造成歧义;把during时间状语夹在threaten和to warm两个动作之间,不知该时间状语究竟修饰哪一个动作。它不可能修饰threaten,因为threaten是现在时态,若修饰to warm位置不对,应放在to warm之后;A中未补出动词,同样会有歧义,同时句意发生改变,因为A表明的是现在的稀有气体的危害与将来50年中的二氧化碳的危害做比较。而原句意中是表述两者在将来50年中的危害的比较,这可由tiny及even这两个表明作者语气的词暗示出来。B准确表达此意,在前面的E5—56中曾提到,during不与将来时段连用,B中用over替换了during。同时,over短语修饰warm,位置准确:than之后补出了will,表明了两者都是在将来此时段的比较。值得提出的是,本句中比较的动作不再是句中的主要动词threaten而是动作warm。
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