1 a bit,a little,not a bit,not a little
2 a number of,the number of
3 a people,peoples,people,the people
4 a score of,scores of
5 able,capable
6 about,of
7 about,on
8 above,over,below,under
9 above all,after all,first of all
10 absent from,absent in
11 accept,receive
12 accident,incident
13 accomplish,complete,finish
14 act,action,deed
15 act,action,deed
16 add to,add…to,add up to
17 advantage,benefit,profit
18 adventure,venture
19 advise,persuade
20 affair,business,matter,thing
21 affect,effect
22 afraid of,afraid to
23 after,behind
24 after,in,within
25 after,since
26 after a while,for a while
27 ago,before
28 agree on,agree to,agree with
29 aim,purpose
30 alive,living
31 alive,living
32 all,all of,whole,the whole of
33 all but,all…but
34 All right,That's all right,That's right
35 allow,let,permit
36 almost,nearly
……
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