1.He has been telling (tell) jokes in the past minutes to keep us interested in the subject.
2.In addition, the more you work out, the more energetic (energy) you will become.
3.My previous teacher has a great sense of humour and always keeps us amused (amuse)with her stories.
4.State schools are paid (pay) for by the government, but in private schools, the parents pay for the education of their children.
5.The writer expressed himself incorrectly (correct).As a result, he made himself misunderstood.
6.The activity is not well organised (organise), which makes us very disappointed.
7.Her speech gave us the impression (impress) that she was positive about the new teaching system.