Here are the suggested answers for the blanks:

23: A. facilitator
24: B. In spite
25: B. Moreover
26: C. However
27: D. may not

So, the completed passage would read:

E-learning is a form of learning, using electronic means, primarily e-mail and the Internet. The teacher's role in online learning is mainly that of a facilitator. There is less direct teacher-to-student interaction than normally found in the classroom. Learning is largely self-motivated, and the student bears more individual responsibility to manage time and complete tasks within the given time frame. In spite of this, some students learn less effectively through this method and do not have the required self-discipline to learn via the Internet.

E-learning provides a number of advantages for users; significant disadvantages also exist for students. Additionally, the effectiveness of E-learning also, however, is based on an individual’s learning style and behavior type. Further, their learning styles may differ and they may not be able to comprehend the given information without further explanation from a teacher. E-learning does not have a way of ensuring that the students are really learning the material. E-learning also does not accommodate the different learning styles of the students. Not all students are self-motivated and self-determined to handle online courses. Therefore, as suggested by a private Master’s of Computer Application’s college, E-learning may not be able to completely replace the traditional classroom.