阅读下面材料, 在空白处填入适当的内容(1个单词)或括号内单词的正确形式.

         Wonder why you get angry so____ (easy) while your friend smiles all the time? It's probably ____you both have different personalities（个性）.

         Personality is also about ____people think, behave, and react to everything around them from day to day.

         So what ____ (make) people think and behave in certain ways?

         Part of the reason is that people are born like this. ____baby gets his blood type, genes(基因）and other physical things when he's still inside his mother. These things may help decide what the baby will be ____.

        But one's personality doesn't stop here. Family life, school learning and life experience can also make you the person you are. This doesn't mean it's impossible ____ (change) your personality. You can always try to make yourself ____ (good). Don't get too worried about your week points. Just accept them. This is a good way start making changes.

        If you don't know how to make friends, find out why. Is it because you are too shy? Tell ____ (your) to smile at people. Start talking to people using warm greetings.

        Don't give yourself a hard time about it. It's not easy to change lifelong ____（habit） overnight.

       Keep working at it. One day you'll see that you can turn over a new leaf and be a new one.