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—Jack, I have     working out the math problem.—Don't worry. Let me help you.A. fun B. trouble C. e...

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took, to work out  takes, to work out   has taken, working out  is taking, working out  
succeed in    succeeds in    succeeding in    succeeded in  
had been working; are still working  had worked; were still working  have been working; have worked  have worked; are still working  
has run out   is running out   has been run out   is being run out  
had worked ; come out    have worked ; came out    had been working ; have come out    have been working ; have come out  
carry out    figure out    watch out    make out  
had been working; are still working    had worked; were still working    have been working; have worked    have worked; are still working  
have worked hard  worked hard  had worked hard  have been working hard  
will work    was working    have been working    had been working  
had been working; are still working   had worked; were still working   have worked; were still working   have worked; are still working  
had been working; are still working  had worked; were still working  have been working; have worked  have worked; are still working  
have worked    had worked    have been working    had been working  
had been working; are still working    had worked; were still working    have been working; have worked    have worked; are still working  
was talking to    am talking to    talked    have talked  
had been working; are still working    had worked; were still working    have been working; have worked    have worked; are still working  
to work out    at working    at working out    for working out  
had been working; are still working    had worked; were still working    have been working; have worked    have worked; are still working  
had been working; are still working    had worked; were still working    have been working; have worked    have worked; are still working  

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