ПОМОГИТЕ ПОЖАЛУЙСТА с косвенной речью

1)... stated that thir main goal was to build...
2)... that  scientists were working hard on that project that time
3) ...that they had already built...
4)... that the tead had been working on that robot for the previous  ten years
5)... that he had taken the ...
6)...with them
7)...his speech...him
8)...thet their robot would be ....