I
1/ The boys stood on the desk.They wanted to get a better view.
=> The boys stood on the desk so that they could get a better view.
2/We lower the volume. We don't want to bother our neighbours
=> We lower the volume so that we wouldn't bother our neighbours.
3/ I will write to you. I want to you know my decision soon.
=> I will write to you in order that you can know my decision soon.
4/ These girls were talking whispers, They didn't want anyone to hear there conversation.
=> These girls were talking whispers so that anyone wouldn't hear the conversation.
 5/I spoke loudly. I wanted everybody could hear me clearly
=> I spoke loudly so that everybody could hear me clearly.
6/You must take your umbrella. You won't get.
=> You must take your umbrella so that you won't get wet
II
1.the sun is not warm . We can't live on it. 
The sun is___not warm enough__________for us to live on.
2.the water is quite warm. I can drink it.
The water is___ warm enough________ for me to drink. 
3.the film was so boring that . We couldn't go on seeing it. 
The film was ____too boring______for us to go on seeing it. 
4.the film was very boring. We left before the end. 
The film was_______very boring enough___for us to leave before the end.