1
.
I
Professor
Brown
____________________
on
the
causes
of
brain
tumors
.
2
.
I
don't
think
you
____________________
how
much
time
I
spent
preparing
this
meal
.
3
.
There
is
a
lot
of
____________________
between
the
study
of
sociology
and
the
study
of
economics
.
4
.
He
left
his
busy
job
to
____________________
more
time
to
his
family
.
5
.
Young
people
today
are
under
____________________
pressure
to
succeed
.
6
.
The
____________________
of
the
negotiations
seems
to
have
satisfied
the
wishes
of
everyone
involved
.
7
.
I
have
____________________
many
famous
novelists
in
my
essay
on
20th
century
English
literature
.
8
.
Many
teenagers
are
surprisingly
____________________
about
current
politics
.
9
.
My
brother
regularly
gives
____________________
on
modern
French
literature
.
10
.
The
presentation
of
the
student
was
so
____________________
that
all
of
the
teachers
gave
him
the
highest
mark
.
11
.
Jack
and
Tom
decided
to
end
their
business
partnership
because
there
was
a
____________________
difference
in
their
opinion
about
the
management
of
the
company
.
12
.
The
main
____________________
of
this
social
project
is
to
raise
awareness
against
cyber
crimes
.
13
.
He
tried
really
hard
accomplish
his
____________________
,
and
he
finally
succeeded
.
14
.
Most
of
the
old
buildings
in
the
city
have
been
____________________
and
opened
to
the
public
.
15
.
I
____________________
that
Tim
and
Dave
are
not
coming
to
the
wedding
because
they
haven't
replied
to
the
invitation
.
16
.
Professor
Cameron
is
an
____________________
on
child
psychology
.
