- The volcanic eruption in the Philippines in 1991 was _________one.. - Tidal waves are the result of an abrupt shift in the underwater moving of the Earth.. - The teacher felt angrily when he saw what was happening in the classroom.. - in the United States. - The internet started in the 1960s. - In the 1970s, scientists worked on it. - Then in the 1980s, telephone companies made it possible to communicate on the computer network in many more countries.. - Tidal waves are the result of an abrupt shift in the underwater moving of the Earth. - The teacher felt angrily when he saw what was happening in the classroom. - It started in the 1960s . - In the 1970s
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