Well I can't stress it enough - Context, Context, CONTEXT. The module stresses "Texts and Contexts". You need to talk a lot about what was happening in the era, then weave quotes and techniques through your response to show you know what you are talking about.
Example, "The rise of totalitarian regimes in Huxley's era is highlighted by the satirical name given to Lenina, referring to the rising leader Lenin. This shows...yada yada"
Or, "The opening scene of Blade Runner depicts a society filled with industrial ruin, stressing the concern in Scott's era of environmental destruction through extreme globalisation..." etc. etc.
Make sure you show similarities and differences, and don't blabber on about crapola! Heh.
Saying this, the best mark I've gotten is 17.
But I know this is what is expected to get the top marks.
Hope it helps.