to use it. I decided to teach her. I sat and __5__ everything and she seemed OK with what I said. Unfortunately, my sister called me at that moment __6__ we talked on the phone for an hour. Then when I saw her again, she was sitting in front of the computer, looking quite __7__. The screen saver (屏幕保护) had appeared and she didn't know how to __8__it off. She had tried __9__ every key and it didn't work. I told her, "Just __10__ the mouse a little." What I meant was that she just needed to move the mouse around to __11__ the computer up. What she did was to __12__ the mouse and start shaking it around in mid­air until the __13__ went completely black. I couldn't help laughing because of her funny __14__. The more I laughed the__15__ she got.

　　She thought that I was a(n) __16__ teacher and she decided to figure the thing out herself. Well, at least I helped her overcome her __17__ of breaking something and encouraged her to __18__ a little.

　　About a week later, I found a home­made __19__ card with a mouse on the front making a funny face __20__ to my door. It said, "Thanks for the computer lessons. Love, Mom."

　　1．A.knowledge　　　　　　　B．theory

　　C．technology D．history

　　2．A.watch B．train

　　C．play D．see

　　3. A．thought B．heard

　　C．found D．ignored

　　4. A．why B．when

　　C．how D．where

　　5. A．learned B．described

　　C．explained D．discussed

　　6. A．and B．but

　　C．because D．since

　　7. A．amusing B．relaxed

　　C．interesting D．discouraged

　　8. A．get B．break

　　C．cut D．turn

　　9. A．hitting B．feeling

　　C．changing D．removing

　　10．A.hang B．shake

　　C．rub D．push

　　11．A.clean B．wake

C．bring D．take