Choose the correct options to complete the sentences

He's only on page 20 of this book, and he's [been reading|read] for hours!

Michelle [has written|has been writing] 30 emails today!

Look at Kate! She's so happy! She [has been graduating|has graduated] from the university!

 Sarah plays basketball really well, and she        [has played|has been playing]        it for half a year.

Ben's eyes hurt — he [has been working|has worked] on a computer since morning.

We're having a party tonight — my mum and sister have [cooked|been cooking] all day long.

I can't find my purse — I        [have been looking|have looked]        for it since I came to work.

What? Haven't they finished yet? What have they [done|been doing] all this time?