Not seeing Justin, his sister , Kelly, nine, heard him his favorite CD in his room.
A. aged; put on
B. age; put down
C. aging; put on
D. to age; put out
网友回答
(答案→)A. aged; put on
B. age; put down
C. aging; put on
D. to age; put out
解析：考查过去分词做定语和词组辨析，aged nine九岁的…,修饰Kelly，第二空考查词组：put on播放，穿上，put down放下，put out扑灭，句意：看不见贾斯丁，他九岁的姐姐Kelly听到他正播放他最喜欢的CD。选A。