OG 90

jackiexucd

The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as “standing waves.”

 

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(E) stationary crests and troughs although they are formed by rapidly moving air, is

 

 

正确答案是C，我选了E

OG上给的解释是：The clause following although is awkward and unclear

hill1005

the resulting flow pattern, with stationary crests and troughs although they are formed by rapidly moving air, is moving rapidly, are known as “standing waves.”

E完整代入题目，注意两个标红的地方， With 引导的独立主格里面不能包括Although从句，这就是OG的意思

jackiexucd

哦！原来如此

谢谢

jackiexucd

不好意思没看清楚……可是C里面也有although，从句里面有although是可以的吗……

hill1005

yes, you are right in this item which is a little difficult although the structure is clear. 

Shadowx

C) A & B 怎樣怎樣 雖然 怎樣怎樣

E) 怎樣怎樣的 A & B 雖然他們 怎樣怎樣

E 怎麼覺得都是沒有結束對吧？

用 C 的格式來造句：

..., with Peter & Paul studied very hard although they are very smart already, ...

用 E 的格式來造句：

..., with hard studying Peter and Paul although they are very smart already, ...

ashura

这道题是OG－205吧？

解释在这里：

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=128537