Scientists are still trying to ____the theory of life on other planets. It can be difficult to keep ____with technology because it changes so quickly. The new smartphone uses cutting- ____technology to recognize your face. Some people ____on gadgets too much and can’t live without them. Many people scroll ____social media before going to bed. Machines help reduce human ____. Social media can ____people closer together. The internet has ____the way we work. Engineers worked hard to ____great progress in renewable energy. Innovation usually leads ____progress in society. Some discoveries can have harmful ____. New medicines sometimes have unexpected side ____. Innovations often change people’s lives in ____ways. Teenagers should be careful with their digital ____.

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