It's
advisable
that
the
president
listen
to
the
citizens
.
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.
It's
necessary
that
we
study
for
the
exam
.
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.
It's
important
that
you
have
a
lot
of
information
before
you
vote
.
(
informal
)
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.
It's
essential
that
we
do
what
we
can
to
help
.
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.
It's
a
shame
that
there
are
people
without
a
home
.
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.
