Question

　　In 1959, mankind sent its first satellite, without men　　 1._________

in it, which circling the earth only outside the atmosphere.　　2_______

In 1969, a large three-men spaceship travelled safely to　　 3_______

the moon. There it lands the first human beings on the soil　　4_______

of a strange world and then brought it back.　　　　　　　　 5_______

　　Scientists have been used the following three tests to　　 6_______

find out how good people can live in space. First, they　　　　7_______

tested astronauts on the earth under conditions like in　　 8_______

space. Second, they sent mice and dogs into space to see　　 9_______

either they could live there or not. Finally, they sent　　 10______

people into space.

Answer 1

答案：
解析：

1. sent→ sent up 解: send up为发射。 2. circling → circled 3. three-men → three-man 4. lands → landed 5. it → them 6. used → using 7. good → well 8. like in → like those in 9. Right 10. either → whether