All through history, explorers have led the way for people to move into new places. Today, 56. ________ explorers are responsible (负责的) for is leading the way into space.
The first person in space was Yuri Gagarin5 from the USSR. He 57. ________ (send) into space on April 12, 1961 aboardVostok 1. The Vostok 1 spaceship reached 58. ________ point some 300 kilometers high before it began to fall back to the earth. His journey only lasted 108 minutes, but that first trip into space marked the beginning of the Space Age.
The first woman in space was Valentina 59. ________ was also from the USSR. She circled the earth for two days and 22 hours aboard Vostok 6 in 1963. During this journey, it was reported 60. ________ Vostok 6 completely circled the earth 48 times!
Twelve people have 61. ________ (actual) walked on the moon. Neil Armstrong from the United States was the first man 62. ________ (set) foot on the moon. The space team visited the moon in 1972, and spent almost 3 days on the moon picking 63. ________ rocks and collecting soil from the surface of the moon. They brought these samples (样本) back 64. ________ the earth for scientists around the world to study.
So far, only about 300 people from all around the world 65. ________ (be) into space, but the number will surely increase as scientists continue to explore space.
56. what 57. was sent 58. a 59. who / that 60. that 61. actually
62. to set 63. up 64. to 65. have been
