a(an)
a few
a little
a lot
able
about
above
afraid
after
afternoon
again
age
ago
agree
air
airplane(plane)
airport
all
almost
along
already
also
always
a.m.
america
american
and
angel
angry
animal
another
answer
any
anyone(anybody)
anything
apartment
apologize
appear
apple
April
argue
arm
army
around
arrive
art
as
asleep
ask
at
August
aunt
autumn(fall)
available
away
She was so tired that she fell asleep quickly.
她如此疲倦以致很快就睡著了。
