根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
How do you enter a room full of strangers? Do you walk right in full of confidence? Or do you try to slip in without being noticed? ___小题1:___
In life, we admire those who do their tasks confidently. We prefer people who appear to know what they are doing. But where does that confidence begin?
Developing self-confidence starts very early. It’s parents’ role to get kids on the right track toward becoming confident people. ___小题2:___ That can be done by focusing on the child’s strengths. Parents should encourage their children to try new things and take risks. When children make mistakes, their parents should still let them know that they are loved. Children whose parents do these things will likely develop into confident adults. ___小题3:___ So what’s the solution?
With most things in life, practice makes perfect, and that is true of confidence skills. ___小题4:__Always hold your head high and look people in the eye. Answer questions clearly and confidently.
Focus on the things that you do well, and look for opportunities to use those abilities.
Prepare thoroughly for every project. You’ll approach the task more confidently knowing that you are ready.
___小题5:___ It could be a good test score or a prize from a contest. Remind yourself that one success often leads to the next.
However, all humans fail at times, and you will too. Even with efforts to try all the above, you will never be perfect. But you can learn to love and accept yourself and live your life with confidence.
A．Keep in mind an item that reminds you of a recent success.
B．The more you practice them, the easier they will become.
C．The way you go into new situations show your level of self-confidence.
D．Our goal is to prepare students to go into the world with confidence.E. To help that process, parents should always offer more praise than criticism.
F. Learning from mistakes helps you face the same situation later without fear.
G. But self-confidence still doesn’t come easily.
N2O4（g）达到平衡后，改变下列一个条件，其中叙述正确的是（）