Answer:
2. Dr. Ana Cruz studied biological and natural sciences, and she learned how to categorize plants and animals accurately.
3. Mark Twain is the author of Huckleberry Finn, and he is a classic American novel.
4. John F Kennedy was inaugurated into office in January 1961, and he was assassinated in November of 1963.
5. Some students are nervous around computers, but other students seem to enjoy new digital challenges.
