In Chinese, the planet Mars may 1        (name ) because of its red color. Mars is sometimes referred to as the " Red Planet". The name of the month March 2      ( come ) from Mars. Mars is the fourth planet from the Sun, and the seventh3     ( large ) of the eight planets. Mars is a small, rocky planet which is cold and 4      ( life) . Mars 5      (visit) first hv the spacecraft Mariner 4in 1965. Several others followed， 6      ( include ) the two Viking landers in 1976. After a long break,Mars

Pathfinder landed 7     ( successful) on Mars on July 4,1997.

1._______ 2.________ 3.     4._______

5.      6.      7._______  

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