Ican't believe that i should not have trusted you! a) set/up b) set/on c) set/off

I can't believe that youme! I should not have trusted you!

a) set/up

Set up будет в данном случает, т.к это фразовый глагол который имеет несколько значений .Главное его значение
1)Set up - что то основывать, устанавливать (I set up my own business)
2)и так же он употребляется в значении подставить кого-л. Как в в твоем предложении

My best friend is a very nice boy. His name is Mark. He is very funny, he knows many jokes and like to scare other people. Every time he makes people laugh. But usually he can be very curious, so he can do many bad things. We've met in the plane. We flew in Florida together. I liked him so much there, so we became best friends. We spend time together usually in cinema, or in the park, where we eat ice cream and laugh together. Sometimes we meet at his home, where we play computer games together or play football. So yes, I have much fun with him!

1. There was much snow in winter. 2. There were 4 theatres in our city. 3. There was no lift in our house. 4. There were many new books in our library. 5. There was little milk in the bottle. 6. There were 3 rooms in our flat. 7. There was a map on the wall.
1. There will be much snow in winter. 2. There will be 4 theatres in our city. 3. There  will be no lift in our house. 4. There  will be many new books in our library. 5. There  will be little milk in the bottle. 6. There  will be 3 rooms in our flat. 7. There  will be a map on the wall.
1. Зимой много снега. 2. В нашем городе 4 театра. 3. В нашем доме нет лифта. 4. В нашей библиотеке много новых книг. 5. В бутылке мало молока. 6. В нашей квартире три комнаты. 7. На стене висит карта.