Write "in" "on" or "at".
1. I am __ my house.
2. I will do my home work __ 5:30 pm.
3. The pencil is __ the table.
4. George will arrive __ London.
5. The old lady was talking __ a quiet voice.
6. I went to Madrid __ vacation last year. 7. Let's meet __ 11:45 am.
8. Your textbooks are __ the table.
9. Water boils __ 100 ⁰c.
10. I usually have breakfast __ 7:30.​​