[求助]句子结构og13-99

moontroy

The stars, some of them attremendous speeds, are in motion just as the planets are, yet being so far away from Earth that their apparent positionsin the sky do not change enough for their movement to be observed during asingle human lifetime.
A.The stars, someof them at tremendous speeds, are in motion just as the planets are, yet being
B.Likethe planets, the stars are in motion, some of them at tremendous speeds, but they are
C.Although like theplanets the stars are in motion, some of them at tremendous speeds, yet
D.As the planets,the stars are in motion, some of them at tremendous speeds, but they are
E.The stars are inmotion like the planets, some of which at tremendous speeds are in motion but

正确答案是b, 请问some of them at tremendous speeds是什么句子结构呢，可否举例几个类似的句子结构？

flhuihui1001

参加5th曼哈顿sc教材中的第十二章, 这种叫subgroup modifier

1.        This construction is used todescribe a part of a large group with a modifier.

2.        Construction 1:   ......, some of which + verb   

Eg: The modelexplains all the known particles, some of which wererecently discovered.

3.        Construction 2:   ......., some of them .....

Eg: The modelexplains all the known particles, some of them onlyrecently discovered.

4.        Construction 3:   ........, some .....

Eg: The modelexplains all the known particles, some recentlydiscovered.

5.        The some can be substituted bySANAM, many, each, either, neither, half, one......