1. (2021高一上·惠阳期中) 阅读下面小短文，根据上下文语境，选择合适的单词填入空白处，每个单词只使用一次，每个方框里有一个是多余的词。

explore  confused  impression responsible unique explain

Adolescence(青春期) is aperiod when we teenagers grow into adults. During this period, we often feel lonely and become  about the changing world. We wish to make a good first  on others. Besides, there is much more toaround us. We need to be   for a lot more, too. However, both paints and gains make our teenage years more colorful.