-Oh, so many people in the park?-Nobody likes to stay at home ______ Sunday morning. A. in B. on C. at
---How many children have you got ? ---Two , _______ of them are studying in the university.
We must pay attention to _______ the teacher carefully in class.
We __________for a picnic if it ___________this Sunday.
The house ________ in1950.
The book _______ my husband bought in Shenzhen yesterday was very interesting.