1.
she
has
works
as
a
flight
attendant
for
about
three
years.
she
started
to
work
as
a
flight
attendant
three
years
ago.
2.
she
is
afraid
that
she
may
be
lost
in
the
city.
3.
选A
all
the
year
round.
C和D词组是不正确不存在的的。B指代不明，并不能表示他整年都在出差的状态。
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