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Chinese students aren’t the only ones who have a sleep loss problem. In Australia, teenagers are als...

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haven’t they    have they    aren’t they    are they  
Yes, we aren’t    No, we are    Yes, I am    No, we aren’t  
are there    are they    aren’t there    aren’t they  
Yes, he does    No, they aren't    No, they can't    Yes, they do  
Yes, he does    No, they aren't    Yes, they do    No, they can't  
don’t    aren’t    not    no  
are there    aren’t I    aren’t there    amI.  
before    since    that    after  
isn’t    aren’t    weren’t    wasn’t  
Yes, he does    No, they aren't    Yes, they do    No, they can't  
don't allow    won't allow    aren't allowed    aren't allowing  
do you    don’t they    aren’t you    will you  
is it    are they    isn’t it    aren’t they  
isn’t    aren’t    weren’t    wasn’t  
aren’t speak    doesn’t speak    don’t speak    don’t say  
aren’t having, are having    don’t have, have    don’t have, are having    aren’t having, have  
hundreds of; aren't they  four hundred; are they  hundreds; are there  hundreds of ; aren't there  

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