We have prepared some nice quizzes for you. Every quiz has seven questions and after each question you have the option to look at some additional explanation.
If you take the test again, you get seven other questions.
Click on one of the tests underneath to start a quiz.
[Scoring: for most questions you get 5 points if your answer is correct. If there is more than one good answer possible, you get 3 points for each good answer.]