阅读下面短文，并根据短文后的要求答题（请注意问题后的字数要求）。
[1]It may help you to know that there is no such thing as a perfect speech. At some point in every speech, every speaker says something that is not understood exactly as he has planned. Fortunately, such moments are usually not obvious to the listeners．Why? Because the listeners do not know what the speaker plans to say．They hear only what the speaker does say．If you lose your pace for a moment, wrongly change the order of a couple of sentences, or forget to pause at a certain point, no one will notice your mistake． When such moments occur, don't_______．Just continue as if nothing happened．
[2]Even if you do make an obvious mistake during a speech, that doesn't really matter．If you have ever listened to Martin Luther King's famous speech—” I Have a Dream", you may notice that he stumbles （结巴） over his words twice during the speech．Most likely, however, you don't remember．Why? Because you were concentrating your attention on his message rather than on his way of speech-making．
[3]People care a lot about making a mistake in a speech because they regard speech-making as a kind of performance rather than as an act of communication．They feel the listeners are like judges in an ice-skating competition．But, in fact, the listeners are not looking for a perfect performer．They are looking for a well-thought-out speech that expresses the speaker's ideas clearly and directly．Sometimes a mistake or two can actually increase a speaker's attractiveness by making him more human．
[4]As you work on your speech, don't worry about being imperfect．Once you free your mind of this, you will find it much easier to give your speech freely．
小题1:What's the main idea of this passage? （ no more than 10 words ）
小题2:Complete the following statement with proper words. (no more than 5 words)
It doesn't matter that you do_______________________during a speech．
小题3:Please fill in the blank with a proper phrase in Paragraph 1．（ no more than 5 words ）
小题4:Why do people most likely to forget the flaw（ 瑕疵．） in Martin Luther King's speech?
（ no more than 16 words）
小题5:What does the underlined word "They" （ Line 3, Paragraph 3 ） refer to? （ no more than 3 words ）
沿直轨道向右运动，如图所示，小球进入圆形轨道后刚好能通过c点，然后小球做平抛运动落在直轨道上的d点，则（ ）
