请教GWD24-21

24-21 Nobody knows exactly how many languages there are in the world, partly because of the difficulty (of? ) distinguishing between a language and the sub-languages or dialects within it, but those who have tried to count typically have found about five thousand.

A) and the sub-languages or dialects within it, but those who have tried to count typically have found

B) and the sub-languages or dialects within them, with those who have tried counting typically finding

C) and the sub-languages or dialects within it, but those who have tried counting it typically find

D) or the sub-languages or dialects within them, but those who tried to count them typically found

E) or the sub-languages or dialects within them, with those who have tried to count typically finding

这题我选B,正确答案A

1:A中的IT指代问题,我觉得根据文章逻辑用them指代language  and sub-languages更合适

2.try to do vs try doing

try to d表示打算干某事,还没干

try doing表是正在努力做某事

从以上两点我认为B比A好

请指教

1. it 指代language; 文中的意思是某一种语言与它的亚级或方言之间难以区别。

2. try to do sth. : to attempt to do or get something

try doing sth.: to do or use something for a short while to discover if it is suitable, successful, enjoyable etc

所以A对！

请问在C中的 but those who have tried counting it typically find

这里的IT有没有什么问题 谢谢

因为distinguish between sth. and sth. 所以C,E错！

因为转折，B错! 另C中,  it 多余。所以A 对。 try to do and try doing并不是太大考点, I think they both are fine here。请指教！！

C的错误不是这个吧?根据同一个代词在一个句子中指代相同的东西,既然前面的it指代language,后面也应该是这样啊!

C错在时态find和词组try doing