请教一道语法题

ying777

Q7: PP69.

In human hearing, subtle differences in how the two ears hear a given sound help the listener determine the qualities of that sound.

A.in how the two ears hear a given sound help the listener determine

B.in the two ears hearing a given sound help the listener in determining

C.in how a sound is heard by the two ears helps the listener determine

D.between how the two ears hear a given sound helps the listener in determining

E.between how a sound is heard by the two ears help the listener in determining

答案是A，选了C。请各位童鞋帮忙解释下。谢过。

pansean

主谓一致，subtle differences 是复数...LZ看清楚哦...
再者，这里的in xxxx主动优于被动...

ying777

指点一下就通了，不指点有时就稀里糊涂的。谢谢啊。

backlighting

我想问一下，in和between这儿有没有区别，我选择的时候考虑了这个问题

ALGT

difference between A and B, A和B指的都是有区别的双方，也就是说谁和谁有区别

differnece in C, C不是被比较的对象，而是比较对象被用来比较的方面

the difference between Sam and Dean in GMAT score...
例子可能不恰当，但是就说一个意思，山姆和迪安在GMAT分数上的不同。。。

ss27

ac的区别应该是句子重心发生改变引起了意思的细微差别.