Which composer's last symphony, No. 104 in D major from 1795, is known as the "London"?

Complete the title of Marjorie Kellogg's 1968 novel "Tell Me That You Love Me, ___". Complete the saying: "What you don't know can't..." Which composer's Fifth Symphony, completed around 1808, was one of the first symphonies to use trombones? Which Debussy orchestral work, composed around 1905, contains the movement "Play of the Waves"? Composer Benjamin Britten was born in 1913 in Lowestoft, in which English county? Composer Douglas Moore based his opera "The Wings of the Dove" on a 1902 novel by which author? Composer Mario Castelnuovo-Tedesco turned which Oscar Wilde comedy into an opera in 1962? Composer Sergei Rachmaninoff lent which Russian-born novelist money to come to the U.S. in 1940?