Question

the teachers really didn't know ___ students would pass the final exam. 1.the which of 2.of wchich of 3.which of me 4.in which the

Answer 1

The teachers really didn't know which of the students would pass the final exam.

Which can be used in the sentences when the things or persons in a limited number.

The word ‘which’ is a non-restrictive.

Here the structure ‘which of the’ used to refer to the limited number of students.