đây là trắc nghiệm 5 sao+cảm ơn giúp mình với xin các bạn đấy XIII. Choose the best answer A, B, C, or D to complete the sentences. 91. People from other planets may use _______ to communicate, which is not possible for human beings. A. Landlines B. letters C. chat rooms D. telepathy 92. Teenagers often use abbreviations when ________ . A. Texting B. video conferencing C. sending letters D. talking 93. People who cannot hear or speak often communicate using________ . A. Pictures B. sounds C. codes D. signs 94. ______ is popularly used to enable people from different countries to have meetings. People can watch, and listen to each other through a screen. A. Chatting B. Video conferencing C. Emailing D. Texting 95. The_______ in technology allow astronomers to know more about outer space. A. Developments B. science C. exploration D. discovery