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.