Some pre-school children go to a day care center, they learn simple games and songs.
A. then
B. there
C. while
D. where
网友回答
A. then
B. there
C. while
(答案→)D. where
解析：where引导定语从句,作先行词“a day care center”的定语。where在从句中作地点状语,表示在日托中心孩子们学习简单的游戏和歌曲。then是副词,意为“那么,那时”；there是副词,意为“在那里”；while作连词,引导时间状语从句或让步状语从句。