HSK6 idioms (from vocab list). English definitions from CC-CEDICT.
一丝不苟 (yīsībùgǒu)not one thread loose (idiom); strictly according to the rulesBaike; Jukuu; Yabla
一举两得 (yījǔliǎngdé)one move, two gains (idiom); two birds with one stoneBaike; Jukuu; Yabla
一如既往 (yīrújìwǎng)just as in the past (idiom); as beforeBaike; Jukuu; Yabla
I just wanted to post an answer rather than edit my question, I hope this is ok. I think this information might be helpful to introductory students who browse this forum and are interested in taking the lower level HSK's.
It's been just over 3 years, but I did take the HSK 3 test and passed. I did very well on the listening and reading portions but not so ...