15.Complete the sentences, using the form of the words in brackets.

1. Anna asked me if the astronaut’s costumes were made from . clothing.(breath)

2. After going through a storm, the plane began shaking . (controllable)

3. We definitely cannot live on the planet shown in this photo because it is . (water)

4. Mr. Amstrong is working in a space which has no gravity. (weight)

5. The story talked about a who wanted to occupy the spaceship.(terrorism)

6. When astronauts have trouble in outer space, they must act . (appropriate)

7. I feel in the chat room because they are discussing a totallystrange topic.(visible)

8. Hung has some skills in speaking English with foreigners.(communicate