SAT OG PG192 #12、13Ms.Jordan (proudly) (demonstrated) her company's most popular product,a watch that flashes the time in (lighted) numerals when (pressing a button).这题 (pressing a button) 错了,为何?动名词在这里怎么用,或怎么改?In the 1920s,(much) critical approval (was given to) a group of English writers (known as) the Bloomsbury group,(the most famous) of whom was Virginia Woolf.这题正确答案是无错,为何?（much）在这里的单复数怎么算?mystery person:You are still a long way from SAT."independ

when在本句中用法：瞬间动词+when+瞬间动词，因为两个动作同时发生所以时态一致,都用一般现在时。
approval是不可数名词，所以用much修饰而不用many

(pressing a button).
First of all, you have to take note of what or who is doing the action in this case, and is the action redundant?
lets break it down.
Ms. Jordan proudly demonstrated her company's most popular product
( this is a complete sentence or so called a independent claw that can stand on its own)
a watch that flashes the time in lighted numerals when pressing a button
This is incomplete sentence or so called a dependent claw that can not stand on its own.
* and the second part of the sentence is basically a description of the first part of the sentence. Since there is no subject existed in the second part of the sentence, it can not stand on it own; however, it can be replaced. the correct answer should be when a button is pressed or when the button is being pressed. (however, most of the time, ACT and SAT do not allow BEING. )
in the second sentence, the word MUCH is an indication of a plural object or..... (and it does not make a perfect match with ( was given to) since WAS in this case is a singular helping verb.
if you choose much in this case, you should change the sentence to
* much critical approvals were given to.

1 是press的主语不一致的问题,press这个动作应该由人发出,而原句中pressing的动作由watch发出,导致搭配逻辑错误.所以应该改成 when "a button is pressed" 或者 when "you press a button".
2 much解释为“很; 非常; 在很大程度上” to a great extent or degree,类似用法有much better.不牵涉到单复数问题.