Quiz playing is a wonderful way to increase your knowledge of English as a Second Language. Remember that all of our ESL quizzes have titles that are both friendly and technical at the same time… In the case of this quiz you might like to tell your friends about the “Can't Stop Now Quiz” but no doubt your teachers will talk about “Negative Modal Auxiliary Verbs”. If you hear a technical term and you want to find a quiz about the subject then just look through the list of quiz titles until you find what you need.
As if you hadn't got enough problems learning about modal auxiliary verbs we are now going to burden you down with NEGATIVE modal auxiliaries! It really isn't as complicated as it might appear. For instance the little word "can't" is a negative modal auxiliary - its positive counterpart is "can". So you see, you have probably been using this type of word without even knowing what it is called.
Answer 3 sounds a bit like Oliver Cromwell, the 17th-century Puritan, who actually banned Christmas for a few years ('People shall not, and must not' have fun on a religious festival day in the middle of winter' etc.)
Answer 4 suggests not that it would be wrong for us to have papers, but that it is impossible, and perhaps rather silly to think that there ought to be any.