OG18 693 平行结构 疑问贴

DreamTurelater

693. Discussion of greenhouse effects have usually had as
a focus the possibility of Earth growing warmer and to
what extent it might, but climatologists have indicated
all along that precipitation, storminess, and temperature
extremes are likely to have the greatest impact on people.
(A) Discussion of greenhouse effects have usually
had as a focus the possibility of Earth growing
warmer and to what extent it might,
(B) Discussion of greenhouse effects has usually
had as its focus whether Earth would get warmer
and what the extent would be,
(C) Discussion of greenhouse effects has usually
focused on whether Earth would grow warmer
and to what extent,
(D) The discussion of greenhouse effects have
usually focused on the possibility of Earth getting
warmer and to what extent it might,
(E) The discussion of greenhouse effects has usually
focused on whether Earth would grow warmer
and the extent that is,


答案C 解释为This has correct subject‐verb
agreement, eliminates the wordiness of the
original sentence, and the phrases whether . . .
warmer and to what extent are parallel.

那么请问，whether . . .warmer and to what extent 为什么是平行结构？？很奇怪啊，谢谢回答一起加油

DreamTurelater

kluivert 发表于 2018-9-2 00:42
Gmatclub上的解答，借鉴下

While (B) has other problems, the structure about which you ask is 100% co ...

谢谢！！！！