Spectators are reminded that it is ... to take photographs during the match.

1 Spectators are reminded that it is ……………to take photographs during the match.
A prevented B restricted C forbidden D banned
The answer is C. Can you tell me the difference between ‘forbit’ and ‘ban’?

2 From the cliff top is a(n) ………… drop to the beach below.
A sheer B straight C upright D erect

I choose B but the answer is A. I don’t understand why
3 The chairman’s announcement was allowed by a ……………debate
A warm B heated C hot D boiling
I choose B but the answer is D. WHich is correct?

Thanks a lot, Cerberus

All courses at the college are offered on a full-time basis unless ………indicated
A further B otherwise C below D differently

I choose A but the answer is B. Which is correct?

“Otherwise” is correct; it is just a common collocation. “Differently” is much more rare; I suppose it is used to modify adjectives, rather than verbs as in this sentence. “Further” does not make much sense to me. “Below” should have been placed after “indicated”.