a/an
a （an）/one
a bit/a little
able/capable
a little/a few
a lot/a lot of
about/around
about/around/round（ adv. ）
about/everywhere
about/in
about/near
about/of
about/with
about/on
above/on/over
accept/ receive
achieve/gain/get
alternately/alternatively
across/through
address/speak to
affair/business
affect/effect
after/behind
ago/before
agree with/agree to/agree cn
agriculture/farming
alike/like
alive/living
all/all of
all/both
all/whole
almost/nearly
alone/lonely
across/over
already/yet
also/too/either
although/but
although/though
although/while
altogether/all together
always/often
amid（ sO/among
among/between
among/in
amount/number
amount/quantity
ample/enough
ancient/old
and/and also
and/as much as
and/but
and/no less than
and/or
and/while
Another/ifferent
another/other
another/the other
anxious/afraid
any/every
any/some（ pron. ）
any/some（ adj. ）
anybody/no one
anybody/somebody
anyhow/anyway/somehow
anyone/any one
anything/something
anyway/any way（s）
anyway/case,in any
anywhere/any place
anywhere/everywhere
anywhere/somewhere
arise/rise
army/force
around/round
arouse/rouse
arrive/reach/get
article/composition
as/because/for/since
as/for
as/like
as... as... /so... as...
as/so
as/so （ conj. ）
as/such as
as/hen/while
as/which
as well/either
ask/ask for
ask/please
asleep/sleepy
assure/ensure
at all/not at all
at/by
at/for
at/in/on
at night/in the night
at（in） school/at（in） a school
at （in/on ） the comer
at/to
at/with
attend/join/join in/take part in
await/wait
awake/awaken
aware/conscious
away/off
awhile/a while
B
back/backward
bad/wrong
badly/greatly/very much
badly/well
bank/shore/beach/coast/seasic
base/basis
bath/bathe
bath/bathe
be afraid to/be afraid of
be able to/can
be/become
be/get
begin to do/begin doing
……
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