○○○ level ⪢⪢
Please check the _____ of the temperature.
http://qindex.info/i.php?x=19962

○○○ toxic ⪢⪢
Please, check the label to see if the product is _____ .
http://qindex.info/i.php?x=22910

◌◌◌ riddles
12 Riddles to Check if You Can Escape from Dangers
http://qindex.info/i.php?x=1964

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