I Listened to It Several Times to Make Sure." I want to mean I continuously repeatedly played and rewinded it in order to make sure what I listen. "I repeated to listen to it several times to make sure." "I listened to it a few times." - I think this can mean I've heard it a few different times before. "I listened to it repeatedly a few times to make sure." How do you say?

All You Have to Be Is Confident. "All you have to be is confident." "All you have to be is to be confident." "All you have to do is be confident." What is correct and natural sentence?

“Finally a name you can TRUST NIXON” “Finally a name you can TRUST NIXON” I took this phrase from the movie “Minions”, and it was written on a big wall sign of Nixon. I think “the name” would suit better because it’s obviously talking about Nixon not talking about an anonymous person. Why did they use an "a" there instead of "the"?

"I Thought I'll Get Advanced Level, but I've Got Intermediate Level." [The test was a week ago, and the results have come out today.] "I thought I'll get advanced level, but I've got intermediate level." "I thought I'll get the advanced level, but I've got the intermediate level." "I thought I'll get an advanced level, but I've got an intermediate level." Which one is correct?

A Natural Negative Form of Presume, Assume and Suppose. "I don't think he has money." "I think he doesn't have money." As far as I know these two sentences are fine, however the first sentence is more likely natives say and sounds smoother. So my question is, does this also apply to verbs like presume, assume and suppose? "I don't presume(assume/suppose) he has money." vs "I presume(assume/suppose) he doesn't have money." Do they both sound natural? or is it better to choose one? Thanks!