阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
Confidence is very important in daily life. It is ____(use) to develop a healthy attitude(态度). If people are more confident, they are ____ happier. And they can have more chances to be ____ (success). Here are some suggestions to be more confident.
★ Speak loud. When you are not confident, you can't do well in ____ you want to do. Try to speak loud enough so that people can hear you ____ (clear). The high voice can help you become more confident.
★ Play sports. Physical exercise makes you tired but strong. A strong body helps you be full ____ confidence.
★ Encourage yourself. ____ (write) down a list of things you did during the day to see how many things you have done well. Give yourself praise(表扬) for the good things you have done.
★ Pick up a hobby. ____ you like singing, sing as much as you ____. In some ways, a hobby can make you excellent. And it will make you ____ (happy) and confident.
的中点．若∠A=40°，则∠B=____度．
。若飞镖恰好击中A点，则下列关系正确的是（ ）