1. Our spaceship and crew members on a foreign planet. (land, lands)

2. The captain or the crew members for the tracks in the sand. (search, searches)

3. The captain and the pilot strange creatures. (see, sees)

4. The dog and cat their surroundings. (watch, watches)

5. Either creatures or humans toward us. (come, comes)

6. Their leader and the three followers the spaceship. (approach, approaches)

7. The captain and the two crew members forward. (step, steps)

8. Either they or their leader to us. (speak, speaks)

9. Either she or they the language. (understand, understands)