选择：He was sure it was ( ) Sunday because everybody was at ( ) churchHe was sure it was ( ) Sunday because everybody was at ( ) church.A ./,theB .the,/C .a,/D ./,a

选择：He was sure it was ( ) Sunday because everybody was at ( ) churchHe was sure it was ( ) Sunday because everybody was at ( ) church.A ./,theB .the,/C .a,/D ./,a
选择：He was sure it was ( ) Sunday because everybody was at ( ) church
He was sure it was ( ) Sunday because everybody was at ( ) church.
A ./,the
B .the,/
C .a,/
D ./,a

选择：He was sure it was ( ) Sunday because everybody was at ( ) churchHe was sure it was ( ) Sunday because everybody was at ( ) church.A ./,theB .the,/C .a,/D ./,a
选c
回忆时 指某个星期天
at church 在做礼拜

选C a Sunday，泛指某个星期天 at church 意为 在做礼拜

这里应该文章中他进行回忆的一句话，他肯定那是个星期天，因为每个人都在教堂里。选C

A