1
.
It
____________________
have
been
very
expensive
.
2
.
I
____________________
have
left
it
in
the
restaurant
we
had
dinner
at
last
evening
.
3
.
The
exam
____________________
have
been
very
difficult
.
4
.
They
____________________
have
gone
away
.
5
.
That
____________________
____________________
have
been
the
right
restaurant
.
I
guess
there
was
another
one
around
there
so
mewhere
.
6
.
She
____________________
____________________
read
four
books
for
this
literature
class
.
7
.
You
____________________
____________________
eat
that
.
8
.
We
____________________
go
on
the
trip
if
I
didn't
have
to
work
this
weekend
.
9
.
Johnny
,
you
____________________
leave
the
table
when
you
have
finished
your
dinner
.
10
.
When
you
go
to
Berlin
,
you
____________________
visit
the
palaces
in
Potsdam
.
