Read and complete with when or while. 1. Jane was driving home, a cat jumped in front of her car. 2. Karen was studying she heard the phone ring. 3. The children weren't sleeping I entered the room. 4. Sue was reading a book, her brother was listening to music. 5. They were walking in the street they found some money.

1-while
2-when
3-when
4-while
5-when

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.

3. Many Modern medicines were not invented by western scientists but by tribal people who had been using them for generations before the Europeans arrived.
4. We missed our train, so by the time we reached the theatre, the play had ended and audience was leaving the theatre.
5. At the end of their meal they found they couldn’t pay the bill because they hadn`t brought any money with them.
6. The children were thrilled when they unwrapped the electronic toys, but when they discovered that nobody had bought a battery they were very disappointed.
7. When I came out of the cinema I found that a thief had taken my car radio.
8. At first the authorities thought the athlete had been taking drugs, but they soon realized they had mixed up the results of the tests. 
9. When the film star came into the restaurant I didn’t recognize her because I hadn`t seen any of her films
10. When we reached the city centre we couldn’t find a parking space, so we had decided to go by bus the next time.-Right