5✩✩ Choose the correct alternative. 1 He goes to bed in/at ten o'clock. 2 We study German at/on Tuesdays and Thursdays. 3 I play music in/at the evening. 4 My brother goes to summer school in/on July. 5 My birthday is on/at 8th November. 6 Our maths lesson starts at/on 11 am. 7 The school celebrates 100 years in/at 2030. 8 The cat sleeps under my bed in/at night.