<p>You can only really consider vocabulary testing to be just over one-quarter of the CR section. Vocabulary-in-context essentially takes ordinary words and usually supplies alternate definitions to the words based on the content of the passage. That is reading comprehension. Essentially, you could say that the entire CR section is vocabulary since the meaning of words is the fundamental base for reading comprehension. But much of the SC part is not knowledge of vocabulary words but rather knowledge of the context of the sentence which requires reasoning instead of pure rote memorization.</p>