Read the paragraph.

The Space Shuttle

The Space Shuttle was the first re-usable spaceship, able to fly in space and in the earth’s atmosphere again and again. Astronauts use it to carry out experiments, to take satellites into space, and to repair satellites already in space.

(Adapted from Getting the message - Cambridge University Press)

According to the paragraph, choose the best response that completes the sentence. Astronauts use the space shuttle to repair .