我确实知道，现在不少年轻人有一边做作业，一边听背景音乐的习惯。 [

A、 ] I know for sure that quite few youngsters nowadays have the habit of listening to background music while doing their homework. [

B、 ] I know for sure that quite a few youngsters nowadays have the habit of listening to background music while doing their homework. [

C、 ] I know for sure that quite a few youngsters nowadays have the habit of listening to background music doing their homework. [

D、 ] I know for sure that quite a little youngsters nowadays have the habit to listening to background music while doing their homework.