Помогите с английским 7 класс раскрыть скобки и добавить will или be going to

1. Experts expect that the ice cap will disappear one day.2.It's only 10 a.m.  but the sun is already strong. It's going to be a hot day.3.A: I'm really hot.   B: I will open the window4. Next week is going to be the anniversary of the world's worst oil spill.5. My friends have decided they're going to write a letter about the environment to the local newspaper.6. People think that global warming will cause lot's of problems in the future.7.A: I'm going to see a documentary about the enviroment.   B: I will come with you.:))))) ;)))))))))))))))))