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take part operate join to participate in
/；a /； the the； the the； a
As good as As long as As many as As well as
/...a /...the thE.the thE.a
present compare announce remark
should parents encourage parents should encourage did parents encourage parents encouraged
join join in participate in participate
/;a /;the the; the the ;a
不填; a 不填; the the; the the; a
one after another one another the other one by one
questions are often put to the more intelligent students alphabetically disadvantaged students often escape from class teachers should pay attention to all of their students students should be seated according to their eyesight
speak to speak speaking spoken
are encouraged have encouraged are encouraging had been encouraged
take part operate join to participate in
were encouraged are encouraged encourage encouraged
不填；a 不填；the the；the the；a
I agreE. I disagreE. All right. That’s all right.
of themselves of their own for their own on their own
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