单选题 What kind of sound does he find pleasant?

A、 Tinkling sound of a coin dropping.
B、 Clinking sound of keys.
C、 Tapping sound of his typewriter.
D、 Creaking sounds.

【正确答案】 C

【答案解析】最后一段。敲打打字机的键所发出的声音是他最喜欢的。