九年级英语上册综合能力专项训练4.docxVIP

培优专项训练四Unit 4 主题阅读训练 一、完型填空 Computers can injure you. Most other injuries happe n sudde nly. For example, if you 也 a bike and break your arms, it happe ns very 2 . But computer injuries happen slowly. You _3_ know how to ride a bike safely. Now lear n to use a computer safely. Your eyes— 4 light can injure your eyes, __5_ n ever sit too close to a computer screen. Your eyes should be _6 50 centimeters 7 the scree n. 8 remember to look away from it. This gives your eyes a rest. When you use a computer, the window _9 be on your left or your right. If it is behind you, the light will reflect on （反射）the screen. If the window is in front of you, the sun and the screen will 10_ shine into your eyes. Your handsand wrists（手腕）—Hand and wrist injuries can happen becausethe handsand wrists are moved in the same way times. If you use a keyboard for a long time, 12 these three rules: 1 Rest your wrists on something. 2）Keep your elbows （肘）at the same height as the keyboard. 3）Stop sometimes and exercise your han ds, wrists and fin gers in a differe nt way. Your back— Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your n eck. So youshould sit with your back straight. The top part of the screen should be in your arms, legs and n eck.front of your eyes. Your forearms, wrists, handsand the upper part of your legs should all be parallel (平行)to the floor. If you are sitting for a long time, get up 13 30 minutes and 14 your arms, legs and n eck. 15 your computer, but use it safely. ( )1. A. fall overfall dow n C. fall ( )1. A. fall over fall dow n C. fall ()2. A. much quicklyB. fastslowlyD. quickly( ( )2. A. much quickly B. fast slowly D. quickly ( )3. A. able B. maybe off D. fall onto probably D. can C. C. ( )4. A. Too manytoo D. Many more( )5. A. so ( )4. A. Too many too D. Many more ( )5. A. so but D. whe n B. Too much C. Much B. because C. ()6. A.at lastB. atmost ( )6. A. at last B. at most least D. less tha n ( )7. A