Christians go to church on sunday

Christians go to church on sunday 根据句意及首字母提示,补全单词.Christians usually go to c________ on SundaysPS：单词的长度不知道- - it would be wrong to assume that Christmas is only celebrate among the Christians.英译汉 CHU ER ENGLISHIt's a fine day.What about ________?A.to go out for a walk B.going out for a walkC.going out for a walking D.to go out for walking 同样是地点的词为什么是go to the post office（有the）而却又是go to church（the）?这种加the或者不加the有什么其它规定?语法中不是说只要清楚指定什么就用the吗?那为什么church不算是已指定了?和chu suan chu ( go to go to Go to go to go to go to go to go to go-to chu 2 EnglishIt's ____not to let her take part in the Rnglish contest.(fair) to go to意思 need to go to