◎◎◎ grade ⪢⪢
A _____ is a score or mark given to someone's work.
http://qindex.info/i.php?x=7498

○○○ improve ⪢⪢
He studied hard to improve his test scores from the previous year.
http://qindex.info/i.php?x=14543

○○○ stark ⪢⪢
There's a stark contrast between their test scores.
http://qindex.info/i.php?x=18602

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