In which 1937 book does Gandalf tell the dwarves, "I have chosen Mr. Baggins and that ought to be enough for all of you"?

In which 1937 Marx Brothers film does Groucho say, while taking a pulse, "Either he's dead or my watch has stopped"? Entering a mostly male domain in the late 1930s, Peruvian-raised Conchita Cintrón became famous as what? Which 1937 film was remade as musicals in 1954 with Judy Garland and in 1976 with Barbra Streisand? The 1937 German bombing of Almeria was part of which war? "It's me, Bilbo Baggins, companion of Thorin!" is a line from which 1937 novel? In which 1937 novel does Lennie ask George to "tell me, like you done before" about the rabbits? Which 1937 film includes the line "Magic mirror on the wall, who is the fairest one of all"? Which Mexican painter, known for her self-portraits, was twice married to muralist Diego Rivera?