5. We all know there are lots of ______________ (advantage) of living on Mars. So we won’t move out of Earth to Mars.

4. Are there large _________ (number) of students in the classroom?

3. So far, many ___________( spacecraft ) have traveled in space.

2. __________ (hope), we can start again and build a better world on Mars.

1. The journey to Mars will probably be very __________ (comfortable).

10. ____________ (状况) on Mars are very harsh.

9. It’s hard to ___________ (想象) living in a place where there are no cars .

8. The skirt is very ___________ (时尚的) at the moment.

7. Should he take　　　　　 　(火柴) with him if he camps on the moon ?

6. I need a pair of _________ (靴子) I borrow yours, Kitty?