从方框中选择合适的选项补全对话。
A: Hi, Melody!
B: Hi, Michael!
A: Melody, China has launched many satellites and spaceships into space, and they have achieved so great achievement.
B: ____ Do you know who is the first man to travel to the moon?
A: I'm not sure, please tell me.
B: ____
A: ____
B: In 1969.
A: Can you tell something about the space traveling？
B: Sure. On July 20th, 1969. ____ Armstrong got out of the lunar probe and took his first step on the moon.
A: Oh, I remember it seemed that he said something to the earth people at that moment.
B: Yes. ____
A: It's great to say so. Thank you for telling me so much.
B: You’re welcome.
A. This is one small step for a man but one giant leap for mankind. B. He is Armstrong from America. C. When did they reach the moon? D. So is it in our America. E. Apollo 11 sent its lunar probe “Flying Eagle” to the moon. The probe landed on the lunar surface safely.
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时, f (x)＝x－1, 则不等式f (x－1)＜0