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—Have you heard of Earth Day?

—Yes. The first Earth Day ____ in 1970 to educate us to protect our planet.

A. celebrates B. celebrated C. is celebrated D. was celebrated

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How long did it take people to find the answer to this question 15 years ago? And now! you can google it and find the answer immediately!

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Internet search engines at that time were slow and gave many websites that weren't useful. In January 1996, Page and Brin decided to make a better and faster search engine. They thought the results should be based on the most popular websites.

Nobody would give them money for their project, so they used their own money. They also borrowed money from family and friends. Then, in 1998, they were given achequefor $100,000, and they started their own company. Their first office was in a friend's garage. The company's name is Google, a word which comes from mathematics. A “google” is a very high number----1 followed by a hundred zeros.

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