I remember couple days ago I saw the explanation for all of. It is said that sometimes they both right, depends on English usage or US usage.
You above question taken from where.
Now I have one idea to explain it, you see
____ballet dancers
so ballet can serve the role as "the", that's why they choose all of not all.
That's just what my guess, hope someone can verify it.
Another one abstracted from PPToefl
Almost___ countries use the decimal system.
A) all
B) all of
The answer they supplied is A. That prove the general rule all noun. all of the noun.作者: skycrash 时间: 2002-12-11 05:28
Just found some material to explain all usage
http://english.chinaschool.net/expression/all.html pretty slow, take time to show.
The interesting part is
b) all of实足，of all所有的……中偏偏。
Eg. He is all of six feet tall．
他身高实足六英尺。
I never know this before. Can this explain above, I doubt.
[此贴子已经被作者于2002-12-11 5:28:30编辑过]
作者: bessette 时间: 2002-12-11 09:19
He is all of six feet tall.
Here "all of" acts as a adv. while "all of" or "all" acts as adj.above.
The two usages are different respectively.
personal idea!作者: daydream 时间: 2002-12-11 11:52
To: skycrash
这是2000年1月的一道真题. 我也没有更好的解释. 我想你的解释有点道理.
不管怎么样还是要谢谢你.作者: skycrash 时间: 2002-12-11 13:35
if you look at 语法笔记（1998－2001）， 就是水妖主编的那本， the answer is C.
节选如下：
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
. _____ ballet dancers learn five basic positions for the arms and feet.
(A) All of
(B) Of every
(C) All
(D) Every
Key：C
分析：这套题有n多的争议！主要是在选A还是选C的分歧。我的答案是选C，有题为证。
2000－5 Section Two 38题：
Astronomers (use) photography and sighting telescopes (to study) the motions (of all of) the bright stars and many of the faint (one)
此题正确答案是C是对的。
这里之所以认为all of 正确是因为前面有the motion,后面连接了the.特指。
所以可知all of后面是＋the＋复数名词
//有关all, all of 请大家看一些词组体会一下
all ballet dancers.泛指一切芭蕾舞演员（对）
all of ballet dancers无此结构（错）
all of such ballet dancers同上（错）
all of these/those ballet dancers 对，美式英语
all these/those ballet dancers 对，英式英语
参考译文：所有的芭蕾舞演员都学手臂和脚的五个基本位置。
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝作者: yiyuan05 时间: 2002-12-11 21:10
