In March 2004 a new planet was__________ 10 billion kilometers from the Earth and was named Sedna. It was found by the Hubble __________. Some people say Sedna is not really a planet. Anyway, the news _________ very exciting because the planet _________ beyond the planetary Solar System. Space now has become _____________! Such countries as Russia, the USA and Japan are planning to send more money on it. Do you think space exploration so important?
1. a) invented b) discovered c) opened
2, a) microscope b) periscope c) telescope
3. a) is b) are c) will be
4. a) found b) finds c) was found
5. a) large b) larger c) the largest
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