---________ it is from our own planet Earth to Mars!
--- Yes, it takes months to travel to Mars by spacecraft.
A.How soon | B.How far |
C.How long | D.How often |
---________ it is from our own planet Earth to Mars!
--- Yes, it takes months to travel to Mars by spacecraft.
A.How soon | B.How far |
C.How long | D.How often |