________ astronauts cannot go to a baseball game or a movie in orbit , there are many familiar activities that they can still enjoy.
28. They ____ friends since they met in Shanghai ten years ago.
27. When he heard the news, his heart ______ very fast.
26. The old woman could not _____ the terrible noise, and she had to close the door and windows.
25. --- We could have walked to the station. It was so near.--- Yes. A taxi ____ at all necessary.
24. The valley was _____ in sunlight, and the children were singing and jumping with joy