Well, for me it's quite good practice (buy nothing day). Cause nowadays everyone can see plenty of everything. People buy some goods and items spending much money. I guess, most of often we buy unnecessary things.
As for pro and contra: (advantages)
Firstly, you don't have to spend money. There will be more important situation, when you can do it.
Secondly, you can use your time to develop yourself. Learn English, do sport or travel instead of buying doubtful thing.
As for disadvantages, I hardly ever can say anything about it, cause I ve got everything in today's abundance.
As for disadvantage..
Well, I 'm so used to gettig, having, buying everything daily . So , I almost haven't got "buy nothing days" in my life, this in its turn is my disadvantage.
1. 1. We are swimming in the swimming pool.
2. She is watching TV now.
3. I and my sister are going to school now.
4. My father is washing his car at the moment.
5. They are playing the piano now.
2. On the armchair 1) The bank in High Street is big and modern.
On the chair 2) You can sit on this comfortable armchair when you watch TV.
In the street 3) The birds on the tree are not sparrows. What birds are they?
On the photo 4) We can often see roses on the piano in the living room.
3. 1) John and Sally like their house in Green Street.
2) I can see the Barkers, they are in their garden.
3) John! Can you help us please?