since you know he is like that.. then just tell him the paper is
ok ok lor. Then refrain yourself from saying u can do ALL the
question in your papers. Anyway he buay song is his problem, who
tell him, don't study himself.. If i am you, i will avoid talking
to him during this exam period cos i do not want to affect my
mood.. and affect my grades- which is never to be changed once it
is finalised.