For the first ten years, girls and boys grow at almost exactly the same rate. Then ………(1)……… suddenly start to grow more quickly than boys. As a result, girls at the age of thirteen are taller, …………(2)……..…and stronger than boys.
At about the age of fourteen, the average girl starts to grow……….(3)……….. rapidly and the average boy catches up and then surpasses her. …….…(4)…….… girls, boys do not stop growing when they are fifteen or sixteen. They keep growing, although more slowly, …….…(5)……… they are about twenty. Then they begin to shrink, very slowly but surely.Their weight, however, usually goes on ………..(6)………… until they are in their forties. To keep fit, they must cut the fats from their diet ……..(7)……… exercise.
In addition, adolescents undergo changes in facial appearance. The lower half of his or her face changes its………(8)……….. The jaw becomes longer and juts out more. As a result, the chin becomes much more pointed, and the mouth becomes ………(9)……... At the same time the nose also becomes slightly longer. In other…….(10)………, the "baby-face" look disappears. These changes are all part of growing up.