Complete the sentences, using suitable prepositions of time.
( Hoàn thành câu, sử dụng giới từ chỉ thời gian)
1. In England, schools usually start____ 9 am, and finish____ 4 p.m.
2. They built our school a long time ago, maybe ____1990
3. We are going to visit Thang Long Lower Secondary School____ January
4. The school year usually begins ____September 5th every year.
5. The children like playing badminton and football____ their break time.