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no student had passed the exam no one had passed the exam all the students had passed the exam not all the students had passed the exam
are；hasn’t arrived are;haven’t arrived is;doesn’t arrive is;hasn’t arrived
a; the a; a the; a the; the
a; the a; a the; a the; the
should might mustn’t couldn’t
set aside take over take on stick to
On becoming Become One become To become
of becoming; was come true of becoming; came true to become; came true to become; was come true
becoming of becoming become to become
of becoming; was come true of becoming; came true to become; came true to become; was come true
becomes become became becoming
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