【简答题】What is the main goal of sending human missions to Mars? A) To find out if life ever existed there. B) To see if humans could survive there. C) To prove the feasibility of large-scale space ventures. ...
【单选题】听力原文:M: I' ve lost the disc of John. W: If he finds out, he will really lose his temper. How will John react when he learns about what the man did?