单选题 Children like to go to the park ______ Sundays.
[A] at [B] in [C] on

【正确答案】 C
【答案解析】[解析] 考查介词。在某一天——般用介词on。所以答案为C。[知识拓展] at后加时间点:at seven o'clock;in后加较大的时间,或是用在一些固定搭配中:in the morning/afternoon/evening,in summer等。