This led him to/into Street Symphony, a group of professional musicians mostly from the LA Philharmonic, which works with homeless mentaaly ill and disabled populations. A member of the Street Symphony said:" I gave Palmer some tips on vocal techinque, and/ while he taught me life lessons. I got the better end of the deal."

第一个空是填 to 好还是 into好。

第二个空是and和while都可以填吗，还是只能填一个呢。