Let me just summarize everything: your JC can
kick you out if you're not even good enough to be retained. And
that has happened before... I remember reading about one such case
in the papers recently.
However, you would have to be very, very screwed-up to get
kicked out. Just turn up for classes, do your tutorials, and do
everything an average student is expected to do, and retainment
should not be an issue, much less termination.
Thanks for ur detailed explanation.