20．
I am a professor of sports and exercise so I often deal with nervousness in my research with sports people．Actually，most people experience nervousness at some time or another．Dealing with nervousness in a right way can make us feel better．
If you are feeling worried，my ①____ is to first ②____ the cause or causes．Make a list of those things that are making you nervous and work out which ones you can do something about．Put most of your efforts on managing the causes that you can control．
Most people cannot tell the difference between controllable（可控制的） and uncontrollable causes，so things they can't control become a big reason for nervousness．Dealing with this is very important if people want to keep a healthy mind．
Simply try to accept the uncontrollable causes of nervousness．You might be worried about the weather on a big day，an accident or an attack on the train，or perhaps just things that other people are doing at work．The results may be very important but there is still no use worrying．Because you can't control any of these things．Accept that you can't control everything．Once you understand this，it becomes easier not to worry．
If a situation，such as swimming，is causing you to be worried，③try to face it as often as possible so that you can get used to it．
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It can often help to think about yourself doing the thing that makes you nervous-then close your eyes and imagine it going well．Imagine how the flight or job interview is going to happen so that you can get used to it．This will help you understand that the thing you fear most is probably not going to happen．
51．在①、②空白处分别填入一个适当的词使句意完整、上下文通顺．advice/suggestion，find
52．把③句译成中文．试着尽可能多地去面对它，这样你就可以适应它．．
53．回答问题：What does the writer advise us to do with uncontrollable causes？
Simply try to accept the uncontrollable causes of nervousness．
54．在文中找出与"You still needn't worry even if the result may be very important．"意思相近的句子，并将它写在答题卡上．The results may be very important but there is still no use worrying．．
55．在文中找出最能表达该短文主题的句子，并将它写在答题卡上．Dealing with nervousness in a right way can make us feel better．．
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