Discussion of greenhouse effects has usually focused on whether Earth would grow warmer and (Discussion of greenhouse effects has usually focused on )what extent( Earth would grow) to.
划线部分均为省略内容。介词to倒装在了what extent身前。
考试时省这么多不要想了,直接S-V杀AD,语感杀BE
不定式短语to uncover vast new areas应改为ing短语uncovering vast new areas。这点考查了不定式和ing的区别。用之于本题,不定式短语做状语时表达的是主句的目的,显然地,我们不能说“冰盖开始融化”的目的是为了“揭开新的地方”,只能说“冰盖开始融化”的结果是揭开了新的地方。
Discussion of greenhouse effects has usually focused on whether Earth would grow warmer and (Discussion of greenhouse effects has usually focused on )what extent( Earth would grow) to.划线部分均为省略内容。介词to倒装在了what extent身前。
考试时省这么多不要想了,直接S-V杀AD,语感杀BE