---Пожалуйста , помогите!!!!!
Complete the dialogue using prepositions from the box-after-at-by-during-for-in-until-in.
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Scientist: Well, the company first had the idea (1)____ 1990. We wanted to find a solution to the problem of global warming, and (2)___ March the President offered a prize to the team that came up with the best idea. He gave us six months. (3)_____those six months , my team tried several things. (4)____ first we didn't have many ideas, but then we worked on the idea (5)____ six weeks (6)___ we realized that someone else had built it! (7)___that we decided on the idea of the balloons. (8)___ the end of the fourth month we had a good plan.
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We had been waiting (9)__ the President's decision and finally (10)____ November 7 we found out we had won.