... protectedb. itc. fromd. radiate > d 18 1. Carbohydrates and fats are two essential sources of energy for animalgrow.a. and fatsb. sourcesc. ford. grow > d 18 2. By passing sunlight through ... preloaded with print film, hasappeared in the late 19 80s, and has become very popular.a. ab. preloaded withc. has appearedd. has become > c 19 1. Until recently, photocopy machines were regarded ... eighteenth-century novelists > b 19 4. People in the world differ in his beliefs about the cause of sickness andhealth.a. differb. hisc. aboutd. and > b 19 5. In the 18 40s, hundreds of families...