issue题目作为论据的话..it was a really interesting idea..
but issue题目 is only a statement..how it can becomes evidence to support your point? Anyway,
you can make any statement you want including statements made by ETS, but don't use the exactly same word...otherwise, you have to state 'xxx is from issue topic pool and I paraphrase" which would make the whole a little wired, to say the least.