1. In my dream, I talked to an alien from another planet by a very strange language.
2. In             B. to                            C. from                        D. by
3. We walked down that empty street when a UFO appeared in front of us.
4. walked B. that                         C. a                              D. front
5. Where do people live in the future if there is not enough room for everyone on Earth?
6. do B. in                            C. enough                    D. for
7. The gravity on the moon is different of that on Earth.
8. on B. is                             C. of                            D. that

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