Since
computers
were
first
introduced
to
the
public
in
the
early
1980's
,
technology
(
to
change
)
____________________
____________________
a
great
deal
.
The
first
computers
(
to
be
)
____________________
simple
machines
designed
for
basic
tasks
.
They
(
to
have
/
not
)
____________________
____________________
____________________
much
memory
and
they
(
to
be
/
not
)
____________________
____________________
very
powerful
.
Early
computers
were
often
quite
expensive
and
customers
often
(
to
pay
)
____________________
thousands
of
dollars
for
machines
which
actually
(
to
do
)
____________________
very
little
.
Most
computers
(
to
be
)
____________________
separate
,
individual
machines
used
mostly
as
expensive
typewriters
or
for
playing
games
.
Times
(
to
change
)
____________________
____________________
.
Computers
(
to
become
)
____________________
____________________
powerful
machines
with
very
practical
applications
.
Programmers
(
to
create
)
____________________
____________________
a
large
selection
of
useful
programs
which
do
everything
from
teaching
foreign
languages
to
bookkeeping
.
We
are
still
playing
video
games
,
but
today's
games
(
to
become
)
____________________
____________________
faster
,
more
exciting
interactive
adventures
.
Many
computer
users
(
to
get
/
also
)
____________________
____________________
____________________
on
the
Internet
and
(
to
begin
)
____________________
____________________
communicating
with
other
computer
users
around
the
world
.
We
(
to
start
)
____________________
____________________
to
create
international
communities
online
.
In
short
,
the
simple
,
individual
machines
of
the
past
(
to
evolve
)
____________________
____________________
into
an
international
World
Wide
Web
of
knowledge
.
