помогите с 4 заданием!!!

At school yesterday we were taught (teach) how to improve our communication skills. The lesson 2 was not held (not hold) in the classroom, but out on the school field. We 3 were organised (organise) into teams and the plan was to make a bridge. I love this type of activity because it 4 is done (do) in groups. You always have lots of problems, but they 5 can be solved (can/solve) when everybody works together. Was my team's bridge 6 built (build) perfectly? No, and it definitely couldn't be used (can/not/use), but we had fun!