Question

Gap filling
He asked his students __ sit in pairs and look __ each other's work, exchanging advice and comments __ possible mistake. The students corrected their own work and handed it __ to him. He later on crosschecked __ mistakes pointed by the students themselves.

Answer 1

He asked his students to sit in pairs and look at each other's work. Exchanging advice and comments does possible mistake. The student corrected their own work and handed it to him. He later on crosschecked the mistakes pointed  by student themselves. This is  the answer of the above question if u find this answer is correct then hit a star

Answer 2

He asked his students _to_ sit in pairs and look _at_ each other's work, exchanging advice and comments _to find_ possible mistake. The students corrected their own work and handed it _back_ to him. He later on crosschecked _the_ mistakes pointed by the students themselves.