I (A) AM TRYING SINCE I WAS AT SCHOOL (B) TO LEARN ANOTHER FOREIG...

331) I (A) am trying since I was at school (B) to learn another foreign language (C) but it'svery difficult (D) for me.Part 3: ReadingRead the passages below and choose the correct answer among A, B, C or D.Not so many years ago, the world vitamin was known only to a few scientists. Today itis very widely used, and the importance of vitamins in our foods is common knowledge.Vitamins are life-giving substances found in foods and are needed for the proper growthand general health of the body. The different kinds of vitamins are indicated by letters of thealphabet. At the present time, vitamins A, B1, B2, C, D, E and G are know. A proper dietshould contain a collection of foods in which all of these vitamins are present. Vitamins arealso prepared and sold in tablet and capsule form.Each vitamins has its particular work to do in the life-giving process. Vitamin B1, forexample, benefits appetite and digestion. It also helps the body grow. Another vitamin helpsthe blood to clot, so that danger of bleeding to death in case of injury is lessened. Still anothermakes the eyes stronger of seeing at night. Airplane pilots need plenty of this vitamin.Scientists think vitamins may have some effect on keeping the hair from turning gray.