On October 4, 1957, the Soviet Union sent Sputnik 1 into space and a new age in history began - The Space Age. The Soviets launched more Sputnik satellites in the fifties and by 1961 they had put the first man (1) space. Eight years later, an American finally walked (2) the moon and during the early seventies the US led the Soviet Union in the space race. (3), space travel was expensive and they needed to co-operate more. As a result, in 1975 astronauts from both countries flew two (4) and met in space. Afterwards, one astronaut said that the mission showed that the Soviet Union and America could work together.
Nearly two decades later, leaders from both countries said they (5) on plans for a new international space station (ISS) and by the turn of the century the ISS had started (6)the Earth. Nowadays, the ISS (7)by scientists from all over the world.
At the beginning of the twenty-first century, businessman Dennis Tito paid twenty million dollars and told the world he loved space as he spent eight days on the ISS. Since then, space (8)has developed with plans for regular tours and floating hotels.
And what about the next half a century? In 2009, a Russian Space Chief (9)Russia was planning a nuclear spaceship for Mars. In 2010, the US president Barack Obama told an audience that by the mid-2030s the US (10) humans to Mars. The race for Mars has already started.
(1) A. at B. into C. from D. toward
(2) A. in B. into C. on D. at
(3) A. However B. Therefore C. Furthermore D. Yet
(4) A. spaceman B. spaceflight C. spacecrafts D. spacecraft
(5) A. agreed B. is agreed C. had agreed D. would agree
(6) A. rotate B. orbiting C. orbit D. rotating
(7) A. was used B. is used C. used D. had used
(8) A. tourism B. tourist C. tour guide D. touristy
(9) A. tell B. told C. said D. say
(10) A. had been sent B. will send C. had sent D. would send