上海市行知中学 2019 届高三（上）第一次月考 英语试卷 Ⅱ. Grammar and Vocabulary Section A Leaving childhood and heading into adulthood is a physical and emotional process for teenagers. Growing up is difficult in terms of health as well. As a teenager, you need to understand ___21___ is going on with your body, how to handle those changes, and how to start taking responsibility for your own health. Puberty（or adolence）is a mysterious word. Upon pronunciation, it almost sounds embarrassed. But it is really nothing to be shy ___22___. After all, everyone goes through it.