Вставьте глагол To be в двух местах. Jane didn`t know what to choose – … green jeans or … yellow trousers. –

I don't speak any foreign language but I am learning English now. 
When Paul were using our computer yesterday evening, we were playing in the living-room. 
Have you met your friend this week? – No, I haven't seen him this week. I met him last week. 
Murray made a lot of mistakes when he was doing his homework. 
I don't have to pack my bag because my wife has done it for me before.
We had already built this plant by the end of 1997.
Can you confirm the dates, please? - I have already done it! 
Cigarettes are sold in supermarkets. 
Carelessness often causes mistakes. 
Mistakes are often caused by carelessness.

Some money was spent for flowers to decorate the hall before the conference (For what purpose)

For what purpose was some money spent?