几道SAT语法题!语法大神快点来围观.

几道SAT语法题!语法大神快点来围观.
1British Impressionist BC began his career drawing caricatures, (which became wildly popular, making him a tiday living.)

A. 同上
B. becoming wildly popular to make him a tidy living.
为什麽B不可以呢...还有 which 前面的那个逗号 加了和没有加的区别是什麽啊...
T^T
、
2 My father worked his way through ( law school attending classes in the day) and waiting tables at a restaurant at night.

A 同上
B law school, attending classes in the day

我不太搞得清楚加不加逗号的区别. 所以哪位大神提点一下.thx a lot


3 Her A (parents')marriage gift cannot be B (compared with) C (any present) that D(was given) to her at the time.E (No error)

为什麽这题选C
any表示任何的时候不是都用单数的么.


4 ND （began learning to play cello）at the age of four and was only 25 when she won the first Internation PC competition in Antigua.

A. 同上
B began to learn how to play the cello

别告诉我是因为A比较整洁所以选A 不觉得那个begin learning很怪咩...

最後...这些都不是真题 方向貌似有点奇特什麽的 但是（摊手）反正都研究到了嘛...麻烦一下各位大神啦~