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No, you_____. A. mustn39。t B. might not C. don39。t have to D. can39。t 18. The taxi ____ only hold six passengers. It is full. You take the next one. A. may...may B. can...may C. may...can D. must...can 19. I a little earlier, but I met a friend of mine on the way. A. may e B. may have e C. could have e D. must have e 20. This pen looks like mine, yet it isn39。t. Whose it be? A. must B. can C. may D. might 21. He didn39。t do well in the exam. He hard at his lessons. A. must have worked B. ought to have worked C. would have worked D. has worked 22. I wonder how he that to the teacher. A. dare to say B. dare saying C. not dare say D. dared say 23. Mr Baker, a number of students want to see you. _____ they wait here or outside? A. Should B. Will C. Shall D. Are 24. You the trees. Look, it is raining now. A. mustn39。t have watered B. needn39。t have