Mum to us, Be quiet! Your little sister’s sleeping.
A. shouted
B. replied
C. explained
D. whispered
网友回答
A. shouted
B. replied
C. explained
(答案→)D. whispered
解析： 词义辨析。shouted 喊，嚷；replied 答复；explained解释；whispered低声说。根据句子Be quiet! Your little sister’s sleeping可知小妹妹在睡觉，让我们保持安静，所以妈妈说时应是低声说，避免吵醒孩子。所以选D。