1. at, at(during), on, for, in, in, at, on.
2. on, of, at, on(?), at, in.
3. 1)we went in the computer shop on foot.
2)i put your laptop in your desk.
3)the computer programming lesson is at 5 o'clock.
4)
5)do you want to meet the city centre in this friday.
6)robert never plays computer games on the week.