Lloyd, Mark <br/><br/>
Active grammar level 3 :  with answers / 
by Mark Lloyd, Jeremy Day 
 - Cambridge :  Cambridge University Press,  2011 
 - 215, [1] p. :  col. ill. ;  28 cm. +  1 CD-ROM (digital ; 4 3/4 in.) 
<br/><br/><label>ISBN: </label>9780521152501 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreign speakers<br/>English language--Grammar<br/>English language--Grammar--Problems, exercises, etc.