saintjingjing Wrote:I think "after pounding" is wrong, because I think in C, after pounded is correct because threads can not pound by themselves, and they are pounded, right?
first --
OFFICIALLY CORRECT ANSWERS ARE CORRECT!
do not question officially correct answers!far too many students on this forum make the mistake of questioning the correct answers; please note that doing so is a
complete waste of your time and effort. i.e., exactly 0% of the time that you spend posting "isn't this official answer wrong?" is productive, and exactly 100% of that time is wasted.
"is this correct?" is NEVER a productive question to ask about one of GMAC's correct answers -- the answer is always yes.
"is this wrong?" / "is this X type of error?" is NEVER a productive question to ask about one of GMAC's correct answers -- the answer is always no.
instead, the questions you should be asking about correct official answers, if you don't understand them, are:
"
why is this correct?"
"
how does this work?"
"
what understanding am i lacking that i need to understand this choice?"
this is a small, but hugely significant, change to your way of thinking -- you will suddenly find it
much easier to understand the format, style, and conventions of the official problems if you dispose of the idea that they might be wrong.
--
"pounding" is acceptable because the sentence is just talking about the processes performed on saffron threads. the identity of the person performing those processes is irrelevant, and so doesn't need to be mentioned in the sentence.
the fact that the saffron threads themselves are not performing the actions indicated by these verbs should be clear from the fact that they are the
object of the verbs, as indicated by the pronoun "them" serving as the object.
also -- in general, if you thought that every sentence has to mention explicitly the identity of whoever is performing some action, that's definitely not true.
for example,
new york's streets are often so congested that walking through them can be faster than driving is a correct sentence; the meaning of the sentence does not depend on the identity of the specific person who is walking and/or driving, so there is no need to mention the identity of that person (and the sentence would be a lot more confusing if it
did mention the person's identity).