1. Facebook seems to be very ______________ to my father. He has never used it so far. However, he likes watching videos from my brother studying in the UK. 2. Smoking cigarettes does great ______________ our body, so adults usually ban teenagers from taking up this bad habit. 3. If you don’t want your computers (or laptops) to be attacked by hackers, you must ______________ the antivirus software you are using regularly. 4. Read the text and ______________ its main ideas, and then retell it to your classmates. I’ll let you ten minutes to do it. 5. The best ______________ to get out of the addiction of playing computer games and social networks (Facebook, Zalo...) is to participate in social activities, outdoor sports, or gathering with your friends more often. 6. When you surf Facebook, you seem to be more addicted and curious what is happening with your friends and others, so you only want to stay alone and sit all day in front of the computer. This can lead to some negative health problems such as ______________, obesity, stress, and despression. 7. An essay should include three main parts – the introduction, the body, and the ______________. Go to page 13 in your textbook for more information. 8. My sister is very shy when meeting ______________. I think she should socialize, hang out with friends, and join outdoor activities more. 9. Sitting in front of your computer playing games or surfing the Internet affects you physical health negatively. ______________, it also does harm to your psychology. Therefore,