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What ______ amazing news!
#32992
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a
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an
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the
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/
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Don’t you think this is          useful advice?
#34583
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the
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a
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an
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不填
The dog had _____ serious toothache so its owner took it to _____ animal doctor. 
#32603
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an, an
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the, /
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a, /
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a, an
There is ________ elephant in the picture.
#34319
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a
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- What do you want to be when you grow up?-I want to be_______ social worker. Many people are in great need of our help.
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the
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This is a key. It’s ___________blue key.
#33023
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an
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/
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a
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不定冠词(a,an)
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