18. Before she died, the old woman__________ to take a walk with her husband daily. A. used B. ought C. might D. should 19. The president__________ a large number of employees and business partners to the reception last week. A. was inviting B. invites C. had invited D. invited 20. The security guard noticed the broken window while he__________ round the warehouse. A. was walking B. walked C. had walked D. walks 21. The first _________ was done by Alexei Leonov, a Russia cosmonaut on March 18th, 1965. It was 10 minutes long. A. spaceward B. spacesuit C. spacewalk D. spaceship 22. Pham Tuan said everything _________ quite strange although he when he was on the ground. A. was - had prepared B. had been - prepared C. was - prepared D. was - has prepared 23. At night, the ISS can easily be seen from the Earth, as it flies at the ______ of 320 kilometres above us. A. attitude B. height C. level D. altitude 24. The Milky Way is just a _________ in the universe and it contains our Solar System. A. galaxy B. planet C. comet D. meteorite 25. Virgin Galactic is the world's first commercial _________. A. spaceship B. exploration C. space D. space line 26. Mukai Chiaki, the first female Japanese astronaut, _________15 days aboard the space shuttle Columbia in space before it _________ to the Earth on July 23,1994. A. was spending - was returning B. spent - was returning C. spent - had returned D. had spent - returned 27. NASA uses a variety of facilities to _________ microgravity conditions. A. invent B. perform C. do D. create 28. Joan was _________ the moon when she found out she was going to be a I grandmother. A. in B. over C. up D. into 29. Today, the menu on the ISS includes more than 100 items _________astronauts can choose their daily meals before they fly into space. A. in which B. where C. which D. from which 30. “_________I go to the cinema, only when there's a film I really, really want to see”. A. The sky s the limit B. Out of this world C. Over the moon D. Once in a blue moon