Read the following passage. Pick out all the nouns, adjectives, verbs, adverbs and pronouns.
Mammals are warm-blooded animals. Mammals give birth and nurse their young. Mammals also breathe through their nostrils. Whales have no nostrils and cannot breathe like land mammals. Whales have blow-holes, but they must come up to the surface of the water to breathe; otherwise they will drown.
