1
.
SILVIA
:
They
all
say
they
were
at
home
when
the
crime
was
committed
,
but
someone
____________________
lying
.
MARY
:
Well
,
it
____________________
be
my
roommate
Tara
.
I
spent
all
day
with
her
.
And
I
talked
to
Ahmed
,
he
was
at
his
house
with
his
girlfriend
all
day
,
so
it
wasn't
him
.
But
I
saw
Joseph
leaving
the
dormitory
.
SILVIA
:
Then
,
Joseph
____________________
be
lying
.
2
.
TEACHING
ASSISTANT
:
The
students
____________________
____________________
already
known
what
plagiarism
is
,
but
apparently
some
of
them
didn't
care
too
much
.
Some
of
the
papers
presented
were
copies
from
articles
on
the
Internet
.
PROFESSOR
:
They
must
____________________
have
heard
my
talk
about
the
seriousness
of
plagiarism
,
I
assume
.
3
.
DAVID
:
Do
you
think
Marcus
was
lying
when
he
said
he
had
never
had
a
traffic
violation
?
RICHARD
:
He
____________________
have
____________________
telling
the
truth
.
I
saw
a
speeding
ticket
on
his
desk
the
other
day
.
