Which of the following is taken from John Keats’s “Ode on a Grecian Urn”（）？

Which of the following is taken from John Keats’s “Ode on a Grecian Urn”（）？
A、“If Winter comes， can Spring be far behind”
B、“For God sake hold your tongue， and let me love.”
C、“Heard melodies are sweet， but those unheardAre sweeter”
D、“The Child is father of the Man.”
正确答案：C