目录（节选）
A
a few
a great deal of
a great many
a handful of
a kind of
a length of
a little
a lot of
a moment later
a pair of
a piece of
above all
according to
add...to
after a (short)while
after all
agaill and again
agree to do Sth.
all day
all one's life
all over the world
all sorts of
aIl the best
a1l the year round
and so on
apart from
arrive at/in place
as a matter of fact
as/so far as
as if
as well
as well as
ask...for
at a time
at breakfast
at dawn/noon/night
at last
at least
at one time
at ohe's own expense
at present
at sea
at the bottom (of)
at the end (of)
at the mercy of
at the most
at the same time
at times
(a) waste of time
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