Ex1: 1. A. classic B. nature C. degree D. debris 2. A. examinee B. eletronic C. scientific D. preparation 3. A. classical B. poisonnous C. logical D. pollution 4. A. dramatic B. tornado C. historic D. injury 5. A. national B. physical C. arrival D. natural 6. A. creativity B. immature C. negative D. nationality 7. A. impossible B. importantly C. stability D. connectivity 8. A. unlimited B. illogical C. conservation D. priority 9. A. opportunity B. competitive C. communicative D. unfortunate 10. A. authority B. impolite C. unhealthy D. repetitive Ex2: 1. People from other planets may use _______ to communicate, which is not possible for human beings. A. Landlines B. letters C. chat rooms D. telepathy 2. Teenagers often use abbreviations when ________ . A. Texting B. video conferencing C. sending letters D. talking 3. People who cannot hear or speak often communicate using________ . A. Pictures B. sounds C. codes D. signs 4. ______ 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 5. The_______ in technology allow astronomers to know more about outer space. A. Developments B. science C. exploration D. discovery 6. Alexander Graham Bell was a great _______ , who invented the telephone. A. Developer B. conservationist C. scientist D. explorer 7. ______ is important because it may help to solve the problems of overpopulation and exhaustion of resources on Earth. A. Space exploration B. Space travelling C. Space checking D. Space walking 8. To generate cheap and clean energy, instead of burning fossil fuels, scientists have developed _________ . A. Oil B. solar panels C. electricity D. coal burning 9. ________systems use several different ways of giving information with sounds, pictures, and texts on a screen. A. Emailing B. Telephoning C. Multimedia D. Chatting 10. Astronauts use ________ to move around when they are on the Moon’s surface. A. Spaceships B. flying saucers C. space cars D. moon buggies Ex4: 1. I intended _____ to New York next month. A. Flew B. to fly C. fly 2. I prefer _______ a nine-to-five job to working shifts. A. Did B. doing C. do 3. She said she chose _______for one year before entering university. A. To work B. worked C. working 4. She said she ______ to the Moon when she had enough money. A. Travelled B. to travel C. would travel 5. He told his classmate that he ________ a bicycle when he was ten years old. A. Rode B. would ride C. could ride 6. He asked me what the conservationists _______ so far to protect our environment. A. Did B. had done C. do 7. He asked me _______ I preferred video conferencing to face-to-face meetings. A. That B. what C. if 8. Mary wondered if Neptune _______ larger than Saturn. A. Was B. being C. is 9. Leo asked me ________ the differences between Mars and Earth were. A. Which B. what C. how 10. Astronauts said that humans ________ find some way to communicate with aliens. A. Might B. ought C. did