I used to be a baker, but I couldn't make enough dough.

I was trying to start a garden in my backyard, but I was having trouble getting the seeds to grow. I checked the soil, the sunlight, and the watering schedule, but nothing seemed to be working. I decided to consult with a gardening expert, who told me the problem was

I wasn't planting the seeds deep enough, I guess you could say I wasn't getting to the root of the problem.

I'm reading a book about anti-gravity.

It's impossible to put down!

I took my kids to the library and asked the librarian if they had any books on Pavlov's dogs

and she said it rang a bell