Объяснение:
1. We first visited China in 2006.
2. My birthday is on the second of July.
3. at five o'clock, shall we?
4. School starts again in September.
5. There's a party at Emily's at Saturday.( On Saturday)
6. What do you want to do in the morning?
7. Let's go and see Grandma at Easter.
8. Where do you usually go on Christmas Day?
1) on = in
2) at = on
3) At five o'clock
4) все ок
5) at Saturday = on Saturday
6) on = in
7) on = at
8) in = on