根据短文内容，从下框的A－F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余项。

1．________

　　To be a good teacher, you need some of the gifts of a good actor：you must be able to hold the attention and interest of your audience; you must be a clear speaker, with a good, strong, pleasing voice which is fully under your control; and you must be able to act what you are teaching in order to make its meaning clear．

2．________

　　Watch a good teacher, and you will see that he does not sit unmoved before his class：he stands the whole time he is teaching; he walks about, using his arms, his hands and fingers to help him in his explanations, and his face to express feeling．Listen to him, and you will hear the loudness, the quality and the musical note if his voice always changes according to what he is talking about．

3．________

　　The fact that a good teacher has some of the gifts of a good actor doesn't mean that he will indeed be able to act well on the stage, for there are very important differences between the teacher's work and the actor's．The actor has to speak words which he has learnt by heart; he has to repeat exactly the same words each time he plays a certain part, and even his movements and the ways in which he uses his voice are usually fixed beforehand．What he has to do is to make all these carefully learnt words and actions seem natural on the stage．

4．________

　　A good teacher works in quite a different way．His audience takes an active part in his play：they ask questions, they obey orders, and if they don't understand something, they say so．The teacher therefore has to suit his act to the needs of his audience．He cannot learn his part by heart, but must invent it as he goes along．

5．________

　　As a good teacher presently, you must take your audience as your friends, take care of them, help them and give them enough freedom and space．I have known many teachers who are fine actors in class but are unable to take part in a stage play because their brains can't keep discipline：they cannot keep strictly to what another has written．

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。

　　Whenever you are using the computer, your eyes are hard at work．Be kind to them by positioning the monitor 18 to 20 inches away from your face．　　1　　

　　Position the screen at your eye level, with the top of the monitor itself level with your forehead．This will keep you from having to lean your neck back or forward to see the monitor．　　2　　 They can help you raise the monitor a little higher by putting a few books under it．They can also raise the height of the chair or you can sit on a pillow or two．

　　Here is a good piece of advice：　　3　　．Even if you don’t have to go to the bathroom, be sure to take breaks．Kids shouldn’t sit at a computer for more than 30 minutes without a break．

　　When it’s time for a break, start with the eyes．　　4　　．This can give your eyes a rest from all that focusing on the computer monitor．

　　　　5　　 Try to move your muscles．Go for a walk or dance in front of the mirror．Doctors advise only one or two hours of screen time per day, which includes TV, the computer and computer games．Make computer time just one of the activities you do instead of the only thing you do．Your body will thank you forever!

A．Never play computer games too long．

B．Your mom or dad can help you get adjusted．

C．Then you’ll want to give your body a break, too．

D．Focus on something far away by looking out of a window．

E．Leaning your neck back or forward too long will cause pain and damage．

F．At this distance, you shouldn’t have to lean in to read what’s on the screen．

G．Don’t get so involved in the computer that you forget to go to the bathroom．