OG16 SC19、20、23有几个点不解，请牛牛们指点一下~

医生吃鱼

喵兔子 发表于 2016-3-17 19:21
同问这道题  我不明白的是为什么这个地方一定要是平行的结构呢   ?还有E怎么就awkward了。。? ...

OA C选项可以拓展为：Discussion of greenhouse effects has usually focused on whether Earth would grow warmer and focused on （Earth would grow warmer） to what extent

省去括号中的红字，and两边基本平行。

E选项错在the extent that is，这个that引导的定语从句明显结构不完整，缺少宾语，无法翻译。

Bradz

楼上说的对。稍微把括号改一下位置。

OA C选项可以拓展为：Discussion of greenhouse effects has usually focused on whether Earth would grow warmer and focused on to what extent （Earth would grow warmer）