33. The loneliness of the city was brought home to me one early sleepless morning, __________, but by a single one of thosesame pigeons which I had seen from my hotel window.
(A) by way of tossing people in lonely rooms
(B) by people who had tossed in lonely rooms
(C) not only by people tossing in lonely rooms
(D) not by men like me tossing in lonely rooms
(E) not tossing people in lonely rooms only