There are many teachers who prepare questions and answers for ENGLISH BLOG but those who suggest cost effective ways of photo copying for students and teachers are comparatively rare.
Here we have Gipson Jacob Sir who send me the following email
" Pre-Model Questions based on units 1,2,3,4 & 5. If you take photocopies of this pdf on both sides of an A4 paper and cut it, you can have two independent question papers"
Thank you sir for that generous mind.