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            • 1． 【题文】—Can I get my ears pierced, Mom? —No. As a student, you ________ do that.
              A．are allowed to
              B．should be allowed to
              C．may not
              D．shouldn’t be allowed to
              难度：中等
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            • 2． 【题文】I think teenagers ____________ to choose their own clothes.
              A．be allowing
              B．should be allowed
              C．be allowed
              D．should allowed
              难度：中等
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            • 3． 【题文】— May we leave the classroom now?
              — No, you _______. You _______ to leave until the bell rings.
              A．mustn’t; are allowed
              B．can’t; aren’t allowed
              C．don’t have to; are allowed
              D．needn’t; aren’t allowed
              难度：中等
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            • 4． 【题文】It’s a rule in my class that our classroom ______ before 6:00 p.m. every day.
              A．be able to clean
              B．should be cleaning
              C．must clean
              D．must be cleaned
              难度：中等
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            • 5． 【题文】—Computer is so useful. It can do almost everything.
              —Yes, but it ______ what to do.
              A．will tell
              B．has known
              C．must be told
              D．is told
              难度：中等
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            • 6． 【题文】— Do you believe there are aliens?
              — I’m afraid not. I don’t think aliens       in space.
              A．can find
              B．can found
              C．can be found
              D．can be founded
              难度：中等
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            • 7． 【题文】Don’t  put off today’s work for tomorrow. I mean , today’s work _____today.
              A．may do
              B．must do
              C．may be done
              D．must be done
              难度：中等
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            • 8． 【题文】May we leave the classroom now? No, you _____. You_____ to leave until the bell rings.
              A．mustn’t, are allowed
              B．don’t have to , are supposed
              C．needn’t , aren’t allowed
              D．can’t , aren’t supposed
              难度：较难
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            • 9． 【题文】---It’s difficult for the villagers to cross the river.
              ---I think a bridge______ over the river.
              A．should be built
              B．is being built
              C．has been built
              D．was built
              难度：中等
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            • 10． 【题文】— John, you       go out to play until your homework       .  
              —OK, Mum.
              A．must; finishes
              B．can’t; is finished
              C．can’t; has finished
              D．needn’t; finishes
              难度：中等
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