-- Must you play the guitar so loudly ? I can hardly my book .
--- I’m sorry. I didn’t know you were reading .
A. pay attention to
B. rely on
C. catch sight of
D. concentrate on
网友回答
A. pay attention to
B. rely on
C. catch sight of
(答案→)D. concentrate on
解析：考查词组：A. pay attention to 注意B. rely on依赖C. catch sight of看见 D. concentrate on专注，句意：--你偏要这么大声谈吉他吗？我几乎不能专注地看书。--对不起，我不知道你在读书。选D。