iv: If every fascist has a communist smile, what does every communist have?
vi: Who compared the spontaneity of Molotov’s smile to that of a mechanical feline?
vii: Who received a smile from the blonde which he could feel in his hip pocket?
viii: What two adjectives have been applied to the grin of Esox Lucius?
ix: Who, in futile pursuit, grinned like a rodent trap?
i: Chaplin's song "SMILE" (also sung by NAT KING COLE) (googled by dubdobdee)
ii: The SNARK in Lewis Carroll's The Hunting of the Snark (known by dubdobdee
iii: "BREASTLESS CREATURES under ground/Leaned backward with a lipless grin", from Eliot's 'The Wasteland' (recognised by dubdobdee, google-confirmed marnameow)
v: This is from the last paragraph of Thurber's "The Secret Life of WALTER MITTY" (known by dubdobdee)
x: "For Cambridge people RARELY smile/Being urban, squat, and packed with guile", from Rupert Brooke's The Old Vicarage, Grantchester (known by dubdobdee)