51. You can know __________ when you visit History Museum.

A. the history of South China    B. the history of Guangdong's native people

C. the history of Shanghai       D. the history of Hong Kong

（B）

Computers can injure(伤害)you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries happen slowly.

     You probably know how to ride a bike safely. Now learn to use a computer safely.

    Your eyes   Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters (厘米) from the screen. Remember to look away from it sometimes. This gives your eyes a rest.

     When you use a computer, the window should 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 both shine into your eyes.

     Your hands and wrists    Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard(键盘) for a long time, follow 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 hands, wrists and fingers in different 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 and your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms, wrists, hands and 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 every 30 minutes and exercise your arms, legs and neck..

      Enjoy your computer, but use it safely.

50. On Sunday morning, the coffee shop in Fuli Hotel doesn't open until _______.

A. 6:30 a.m.                    B. 7:00 a. m.

C. 7:30a.m.                     D. 8:00 a.m.

49. If you want to buy a new dress, you can go to ­­__________.

  A. 69 Hong Kong Road           B. 368 East Huanshi Road

C. 5300 Shanghai Road           D. 635 Grand Road

48. If you want to go out for lunch on Sunday, you can call at __________.

A. 83386223 or 83338989         B. 87796960 or 83386223

C. 83338989 or 87872738         D. 87872738 or 87796960

46. A. lifted       B. held           C. put            D. picked

45. A. stopped     B. left            C. passed         D. turned

44. A. hands       B. back          C. dress          D. lipstick

43. A. happened    B. failed          C. succeeded     D. hurried

42. A. healthy      B. alive           C. relaxed        D. quiet