Put the verbs in brackets into the correct tense.

1. In 1543, Nicolaus Copernicus (publish) “On the Revolutions of the Heaven Spheres” claiming that the Earth and the planets (orbit) the Su.

2. Galileo (use) the telescope to view the stars and planets before Isaac Newton (invent) the first reflecting telescope.

3. In 1686, Isaac Newton (publish) the Mathematical Principlesof Natural Philosophy where he (lay) the foundations for universalgravitation and (describe) the motion of the Sun and the planets.

4. After Robert Goddard (work) on the rocket technology, he(invent) and (launch) the first liquid-fueled rocket in 1926.

5. On November 3, 1957, the Russian dog Laika (become) the first animal in orbit after fruit flies (be sent) to outer space by the United States.

6. In 1983, Sally Ride (become) the first American woman inspace after Russian cosmonaut Valentina Tereshkova (be sent) in space twenty years earlier.

7. France (launch) its first satellite before Japan(put) its test satellite into orbit.

8. In 1971, the United Kingdom successfully (launch) its satellite into orbit after China (do) that one year earlier.