The given pies graph 
illustrate
 the information about Correct subject-verb agreement
illustrates
results
 of a survey in which undergraduates and postgraduates were asked about the range of books and non-printed materials in their school Correct article usage
the results
library
.
Use synonyms
Overall
, it can be seen from the graph quality of the non-printed in university Linking Words
student’s 
Fix the agreement mistake
students’librariesis
library
 almost very good. Use synonyms
In contrast
, Linking Words
it 
Correct pronoun usage
apply
in 
Change preposition
apply
postgraduate’s
 Change noun form
postgraduate
Use synonyms
library
 are not good. In Fix the agreement mistake
libraries
term
 of Fix the agreement mistake
terms
range
 of books, Correct article usage
the range
about 
postgraduate Change preposition
apply
are
 worse than undergraduate. 
On the one hand, the proportion of books in Change the verb form
is
Correct article usage
the undergraduate’s
undergraduate’s
 Change noun form
undergraduate
library
 was commented Use synonyms
same
 about quality, 37% for very good, 35% for satisfaction, Correct article usage
the same
28
% for not good. Correct word choice
and 28
Likewise
, in Linking Words
postgraduate’s
 opinion Correct article usage
the postgraduate’s
are 
50% is not good, figures Unnecessary verb
apply
of
 satisfaction had more than that of very good, exactly 28% and 22% respectively.
Change preposition
for
On the other hand
, undergraduate was very Linking Words
satisfaction
 Replace the word
satisfied
about
 online materials, Change preposition
with
just
 12% Correct word choice
and just
was
 dissatisfied. Correct subject-verb agreement
were
While
Linking Words
,
 postgraduate students felt not good about online Remove the comma
apply
document
 about 62% and only 34% Fix the agreement mistake
documents
was
 good.Correct subject-verb agreement
were