Hashem, a few suggestions:
course; which- either course, which or course; this
Although adopting a text - text or textbook?
text book- textbook
emergent students needs- student needs as they emerge
As an EFL student I- As an EFL student, I
in hand- I'd use to hand or in my hand
include variety- a
different genres having in mind - different genres, bearing in mind
that the time is not enough- that there is not enought time to add
how EFL teachers can adapt and supplement what he/she believes is good for students,- I'd add 'this raisesx the question of how...' before it
a teacher can adapt his- this should be his/her as you have you he/she later in the sentence
not limit- not to limit (balances better to me)
worldwide web, or Internet- either capitalise both or use both in lower case.