Read and fill in the gaps: must, have to, has to, mustn't, doesn't have to or don't have to.

A teacher is speaking to her students before a test: "You are going to have a test today. Your test papers are on your desks. You ... begin until I say so. You ... hurry; there is a lot of time. You ... speak during the test. You ... copy your friends' work and you ... open any of your books. You ... write in pen; you can write in pencil. You ... stay when you have finished; you can leave but you ... be noisy. You can begin now.