ESL learners, English idioms, English sayings, English slang, non native speakers, online course ... probably only interesting for ESL learners, native speakers should know these. [Now no long typing or tapping.]
DW7 is assisting and added "Reversed" levels at end to change testing emphasis. Please see "What next?" levels for further study. Please post any comments in community.memrise.com. Updated October 2016.