It is the year 2050 now. Tom and I want to visit the Mars. It is a planet (行星) far away from our planet---the       .
Our spaceship (太空船) flew        two weeks to get to the Mars. When we arrived, we        the door of the spaceship and looked out. The weather there        sunny and hot. We saw an alien (外星人) behind a tree.        is very tall and big and has brown hair.“Help me!”      the alien. Then we saw some monsters (怪兽)  running after        alien from the house near a tree. They wanted to kill him. So we had to run away       !We both moved to the         and jumped in. We also took the alien into our spaceship and        him. What an exciting day!
A. Moon     B. Earth      C. Sun
A. for     B. on         C. in
A. closed   B. opened      C. had
A. did     B. was        C. isn’t
A. Him      B. He         C. They
A. shouted  B. talked      C. told
A. another  B. other       C. others
A. quickly  B. easily     C. luckily
A. house    B. spaceship  C. tree
A. scared  B. interested  C. saved