You watched him talking happily with your friends when they asked him something about the upcoming project. When they left, he quickly turned into a completely different person as he checked back your book. Annoyed and irritated looks are the ones you could see on his face.

You stood beside him, waiting for a mark on your book before feeling a bit nervous when he looked at you.

"Can you please explain to me why your answers are the same with your friends'?" He suddenly asked as he looked at you suspiciously.