1 and 2 perfectOriginally Posted by dean1
3 - conviction that. obsession with is correct
4 - perfect
5 - build on sand means to build on something without basis. A little difficult to choose one word - maybe information or research or knowledge?
6 - check or check over, but not check out in this example, although American English speakers may disagree with me!
7 - For could be correct depending on the rest of the context, but my guess is that between would be best.
8 - subject one's work to
9/10/11 - perfect
Student or Learner