Though there was a heavy rain and terrible thunderstorm, the children slept all night.
A. quickly
B. quietly
C. deeply
D. soundly
网友回答
A. quickly
B. quietly
C. deeply
(答案→)D. soundly
解析：
Quickly快地 quietly安静地deeply深深地， soundly酣畅地，sleep soundly表示“睡得很沉”，句意是：虽然有雨和可怕的雷电，孩子们睡得很沉。选D。