Relier Pairs Vocabulary Unit 7 Matching GameVersion en ligne Test your knowledge of Vocabulary Unit 7 concepts with this fun matching pairs game! par Maria Florencia Mena 1 Compatible 2 Ahead of its time 3 Tried and tested 4 Upgrade 5 Innovative 6 Behind the times 7 Spare parts 8 Affordable 9 Experimental A duplicate part to replace a lost or damaged part of a machine. Something that was proven in the past to be effective or reliable Something inexpensive; reasonably priced. Something based on untested ideas or techniques and not yet established or finalized. Something featuring new methods; advanced and original. Something considered too advanced or modern to be understood or appreciated during the time Late, old. To improve the quality or usefulness of something Something that is able to exist or occur together without problems or conflict.