Henry and Mudge take the Big Test

Henry's dog, Mudge, knows how to drool, chase the lawn mower, and be Henry's best friend. But he doesn't know how to sit, stay, or heel. Mudge needs to go to school.

I didn't think that Mudge would pass the test because he can't sit and stay, and he likes sleeping. But he did it. I think he likes a teacher, Jack.  
Jack always treat him friendly, so Mudge followed he says.