---Look! There are so many people in the park.-Nobody likes to stay at home Sunday mo

问题补充：

---Look! There are so many people in the park.

---- Nobody likes to stay at home Sunday morning.

A. in

B. on

C. at

D. to

答案：

A. in

(答案→)B. on

C. at

D. to

解析：在表示时间时，in表示在一个时间范围；on表示在具体某一天；at在具体时刻；to表示差几分到。句意：看，公园里有如此多的人。——在星期天早晨没有人喜欢呆在家里面。结合语境可知选B。