Identifying Sentence Errors - answers for these questions pleas

<ol>
<li><p>While
it was-A
different
from-B
all of the other classes he
had ever-C
taken, Erik was still
unhappy with-D
his psychology class E-no error</p></li>
<li><p>By the time
she finishes-A
her
last final -B
exam next week, Jen
has spent-C
eighteen hours consolidating,
outlining, and studying-D
her class notes E-no error</p></li>
<li><p>The success of a new computer company
lies-A
in its ingenuity; the machines must have a clever design, be efficient in a unique wat, and generally
they provide-B
the consumer with
previously unknown-C
but-D
now vital features E-no error</p></li>
<li><p>Nothing
prepared-A
the country for the brutal civil war faced
it faced- B
at the end
of the century,-C
even though
they saw-D
several wars previously E-no error</p></li>
<li><p>To take with
one's-A
grandparents
about-B
their
lives-C
when they were young is
having-D
a real understanding of history. E-no error</p></li>
<li><p>Most of the exchange students
which-A
were working
in the shore area-B
could barely make enough money to support
themselves-C
during the summer-D
months. E-no error</p></li>
<li><p>Either Jack or Ashlee
are-A
volunteering at the shelter this
weekend,-B
but
she-C
won't go if he
is going-D
E-no error</p></li>
<li><p>As its popularity
has grown,-A
the Weimaraner, like other popular breeds,
have-B
run-C
the increasing risk of over-breeding. E- no error</p></li>
<li><p>There was a time
where it-A
was common practice for men
to surrender-B
their-C
seats to women,
but-D
that era seems to have passed. E-no error</p></li>
</ol>

<p>you dont have to give explanations just answers I want to check if im right thanks!!!!!!!</p>

<p>21)e
22)c
23)b
24)d
25)d
26)a
27)c
28)c
29)a</p>

<p>can you please explain 21, 23, and 27?</p>

<p>you should really re-write it with the parentheses, its hard to tell what exactly the letters are standing for. Anyways and i am REALLY Bad with this let me try. Hopefully someone can mistake me for the lots I will get wrong </p>

<ol>
<li><p>I can’t really find an error (not sure if ever is needed) but i would go with E</p></li>
<li><p>Definitely C, starts off with by the time she finishes her exam NEXT week so HAS spent is incorrect</p></li>
<li><p>B, parallelism </p></li>
<li><p>D </p></li>
<li><p>i think D</p></li>
<li><p>A</p></li>
<li><p>A</p></li>
<li><p>B</p></li>
<li><p>E i think</p></li>
</ol>

<p>Keep in mind i got a 570 on writing on the dec SAT, im trying to practice!</p>

<p>haha needshelp i got a 570 too and thanks im trying to practice as well!</p>

<p>27 is def A not C, that is a singular subject so IS would be needed</p>

<p>28 is def B, you need a singular verb (have is plural)</p>

<ol>
<li>how is it an error in the sentence?</li>
</ol>

<p>ACBDDAABA 10char</p>

<p>apn how is 21 A?</p>

<p>and how is the last one A?</p>

<p>We are all getting different answers…lol</p>

<p>

</li>
</ol>

<p>Sorry I meant 28 to be B and 27 I quickly read over thinking that both names were girls names and so the she was ambiguous. </p>

<p>29 I thought should be There was a time when it was…not where it was. Could be wrong. </p>

<p>I got a 770 on writing and I mostly just go by ear.</p>

<p>21 A is wrong since the word “it” is placed incorrectly and appears to be referring to Eric.</p>

<p>29 A is wrong since it should be a time “when” (time is time, not a place).</p>

<p>^^ oh i thought the letter was only applying to the it in 29, you are right</p>

<p>then how would you fix 21?</p>

<p>What? why is it place incorrectly?</p>

<p>So wait what would 27 C be if its not she? aren’t they a boy and a girl?</p>

<p>Yeah I made a mistake on that one.</p>

<p>the error in 27 is not in C but rather in A. In A there is a singular subject paired with “are”. Obviously there should be a “is” in that spot. </p>

<p>Many people might mistakenly put C thinking it’s ambiguous. But there is one female and one male so that’s not a problem. And if there were 2 females you would replace she with the name</p>