Choose the right word to complete the sentences. 1. (Million/Millions) of people travel abroad and enjoy it. 2. I have three (hundred/hundreds) books at home. 3. I know at least two (dozen/dozens) places where we could go on holiday. 4. One can see (thousand/thousands) of stars in the night sky. 5. Nick brought (hundred/hundreds) of photos from the summer camp. 6. We have learned several (hundred/hundreds) English words. 7. This car can do ten (dozen/dozens) miles an hour. 8. The population of Great Britain is over fifty (million/millions) people. 9. Moscow Zoo has (hundred/hundreds) of species of different birds. 10. There are only four (hundred/hundreds) pupils in this school.