I. Rewrite the following sentences based on the given words. 1. The ISS stands for the International Space Station. It is a space station, or a habitable artificial satellite, in low Earth orbit. → .......................................................................................................................................... 2. Kjell Lindgren is a NASA astronaut. He is replacing items inside the ISS. → Kjell Lindgren ................................................................................................................. 3. NASA is an American’ independent agency of the executive branch of the United States federal government. It is responsible for the civilian space program, as well as aeronautics and aerospace research. → .......................................................................................................................................... 4. The Skylab was established in the orbit in 1973. The first Apollo Moon landing mission were completed in 1969. → By the time ...................................................................................................................... 5. The first of four orbital test flights occurred in 1981, leading to operational flights beginning in 1982. → Before ..............................................................................................................................