Answer:
The first box is "an" because, From Enemy to Friend is a expository text about dogs and wolves, doesn't sound right but, rom Enemy to Friend is an expository text about dogs and wolves, does sound right. To me at least.
Step-by-step explanation:
The second box is, "tiny" because "wolf PUPS" not adults. But if you don't think thats the answer, then it's large.
The third box is, large
AND the last box is friendless.
That is what I think your teacher might think otherwise.
Hope it helped!