1. TO STAY WARM (A) in cold weather, cold-blooded animals must expose ITSELF (B) to A SOURCE OF (C) warmth such as DIRECT (D) sunlight
2. The PURPOSEFUL (A) of elementary school is TO INTRODUCE (B) children to the skills, INFORMATION (C), and attitudes necessary for a SMOOTH ADJUSTMENT (D) to society
3. It is possible TO GET (A) a sunburn on A CLOUDY (B) day because eighty percent of the ultraviolet rays from the Sun WOULD (C) penetrate cloud COVER (D)
4. PRESENT (A) in rocks of ALL TYPES (B), hematite is PARTICULAR (C) abundant in the sedimentary rocks KNOWN (D) as red beds
5. For hundred of years, sailors RELIED ON (A) echoes TO WARN (B) them of ANOTHER (C) ships, icebergs, or cliffs in FOGGY (D) weather