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题库 / Prep2007E2-SC-64
The majority of scientists believe that to reduce and stabilize atmospheric concentrations of carbon dioxide, emissions must be cut at the source by fossil fuels that are burned more efficiently and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether.
fossil fuels that are burned more efficiently and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether
fossil fuels that are burned more efficiently and, in some cases, those that are replaced altogether with alternatives such as hydrogen fuel cells
burning fossil fuels more efficiently and, in some cases, by replacing fossil fuels altogether with alternatives such as hydrogen fuel cells
more efficiency in the burning of fossil fuels and, in some cases, by alternatives such as hydrogen fuel cells that can replace fossil fuels altogether
the more efficient burning of fossil fuels and, in some cases, by fossil fuels that are replaced altogether with alternatives such as hydrogen fuel cells
emissions must be cut at the source by……，by做状语修饰cut，不是修饰source
排放被减少不是通过化石燃料和替代品这两件东西，而是通过更有效率地使用化石燃料和用替代品来替换化石燃料这两个手段，所以一切by+实体名词的选项都是错的，选C
AB. 是by更有效率地燃烧，而非by fossil fuels
C. by burning ...... and by replacing ...... 正确
D. by efficiency in burning ...... and by alternatives that ...... 不平行
E. by the burning ...... and by fossil fuels 不平行
语意是通过两种方式降低二氧化碳排放，更有效燃烧化石燃料和用氢燃料替代化石燃料。 化石燃料和氢燃料本身无法降低排放的，所以只能选C
强调动作，所以用ing。
不是cut by fuel，或者其他，而应该是cut by 某个过程，同时注意parallel
emissions must be cut at the source by……，by做状语修饰cut，不是修饰source
排放被减少不是通过化石燃料和替代品这两件东西，而是通过更有效率地使用化石燃料和用替代品来替换化石燃料这两个手段，所以一切by+实体名词的选项都是错的，选C
“通过作某事，使得…”这一意思，只有by doing才是正确的表达方法。