ppksaps Wrote:I have an issue with option E.
'Although eradicated in the United States, polio continues elsewhere and could be'
I feel could here changes the tense to past and it should be replaced by can.
Can some one explain?
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.
--
now that we've gotten
that out of the way...
the instance of "could" in the sentence is an example of what i have described as "#2" here:
post45300.html?sid=a7b44a6d2963b8d1b7fc9ed52378bdb5#p45300