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：本题中用where引导定语从句，先行词是a day care center，where在定语从句中做地点状语。注意then和there是副词，不能引导定语从句。While虽然是连词，但是只能用来连接状语从句。