C. How to use a digital camera. D. How to keep a camera. E. How to save images on the camera. 13. Why should we place the strap around our wrist? A. To make it look nice. B. To avoid falling to the ground. C. To keep the picture still. D. To protect the camera from liquid. E. To get a good result when taking a picture. This text is for questions 13 to 15. A public computer needs to be disinfected. Here are the steps. 1) Turn off the computer,unplug the power cord and remove the battery if cleaning a wireless or portable keyboard. 2) Using light, gentle strokes, wipe the keyboard first with a disinfecting wipe. If the wipe is too wet, squeeze out excess liquid before using it.Don't allow the liquid from the wipe to remain on the area too long. Wipe again with a damp, soft-lint- free cloth, such as microfiber. 3) Dry with another soft lint-free cloth. Taken from: www.today.com 13. Before you clean a portable keyboard.make sure you. __ A. turn on the computer B. remove the battery C. unplug the cord D. connect it to the computer E. change the battery (14) Based on the text, we need __ to do the steps. A. a duster C. a vacuum cleaner C. a disinfecting wipe D. a brush E. a soap and cleaner solution 19. What is the function of the soft-lint-free cloth? A. To disinfect. B. To clean the dirt. C. To hold the D. To dry the keyboard. E. To make