Fill in the gaps with the correct forms of the given verbs

Megan: Hi, Sally. How is your book? [ ] it already?

Sally: Oh, hello, Megan. Not yet. You know, it's not as easy as I [ ]!

Megan: Really? Why?

Sally: I [ ] on the book for about three months already, but it is still far from being finished. I've had to do so much research! I [ ] at the third chapter.

Megan: How many chapters [ ] to write?

Sally: I [ ] about writing nine chapters, but it turned out to be really hard to do. So, last week I [ ] to reduce the book up to six chapters.

Megan: Are you working on the book on your own?

Sally: Yes, nobody [ ] me at the moment, but I've just seen Bobby, and he's offered to give me a hand. I think with his help the work [ ] forward much faster.

Megan: Good for you!

Sally: See you then.

Megan: Bye.