500
Proofread the following sentence and decide that it is correct or revise it.
Seeing the gross frog parts left after the dissections, everyone put their hands over their eyes when Roy began to pretend to eat the remains.
The correct sentence should read, "Seeing the gross frog parts left after the dissections, everyone put HIS OR HER hands over HIS OR HER eyes when Roy began to pretend to eat the remains.