She _________ (work) on the project for three weeks now, and she still _________ (not finish) the initial research phase.
has been working / hasn't finished
I usually _________ (enjoy) classical music, but right now I _________ (listen) to some jazz to change things up.
enjoy / am listening
This is the most fascinating book I _________ (ever/read). The author _________ (describe) the events so vividly that you feel like you're there.
have ever read / is describing