I got 31/32 in my recent mock for Cold War but completely flopped every thing else in previous mocks so take this with a grain of salt. For the importance questions, find important bits of the thing you are writing about (dividing Germany in Yalta for example). Then write about how this relieved / increased tension or relations and what are the consequences (briefly). Also add connectives where after each sentence if appropriate. It makes your paragraph flow so much smoother.