Which of the following is not true of the Space Shuttle Columbia？
A. It was the first rocket ever made in history.
B. It did the first flight in 1981.
C. Its first flight was of great importance in the development of space exploration.
D. It can only stay in space for about a week now.
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定居国外的中国公民回国后出境，凭有效的中华人民共和国护照、旅行证或其他有效出境证件，无需办理签证。 ()
A. 正确
B. 错误
旅游团导游服务集体的任务是为团队旅游者提供导游讲解服务。 ()
A. 正确
B. 错误
A．reactionB．cooperationC．interactionD．relation
A. reaction
B. cooperation
C. interaction
D. relation
What is Michael planning to do on Sunday afternoon？
A. Go out with some friends.
B. Show his sister and brother-in-law around.
C. Sleep all afternoon.
D. Go to a football game.
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