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补全对话-5选5 适中0.65 引用1 组卷31
A: Hello, Mother! We learned about light in physics classes. It travels very fast.
B: 【小题1】
A: Oh. It travels at a speed of 300, 000 kilometers a second. 【小题2】 Light from the sun reaches us in less than 9 minutes.
B: 【小题3】
A: No, it isn’t. Light from the nearest star except the sun needs about 4 years to reach the earth.
B: Wow! 【小题4】
A: Mmm...It takes hundreds of years for light from the farthest star to reach the earth.
B: Oh, how clever you are! I think you can be an astronomer (天文学家) when you grow up.
A: Thank you, Mother! 【小题5】
A．Do you know how fast it travels?
B．Is the sun farther than the other stars?
C．I will try my best.
D．How long does it take for light to reach the farthest star?
E．The sun is about 149, 840,000 kilometers away from the earth.
22-23九年级上·全国·课时练习
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根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。
A: Hi, Jane! I read an interesting book last night.
B: Really? 【小题1】?
A: It’s about a strange travel to Mars.
B: Do you think we can travel to Mars?
A: 【小题2】. Spaceships can take us there.
B: Do you think we can live there?
A: 【小题3】.
B: Neither do I. The gravity on Mars isn’t as strong as it’s on the earth. We can hardly stand still on Mars.
A: 【小题4】. Sometimes it can be 80℃, but sometimes it’s too cold. The lowest temperature can be -138℃.
B: Yeah. It’s really hard for us to live there. But maybe we can spend our holidays there in the future. 【小题5】?
A: It will take us about eight months to get there by spaceship when the two planets are closest to each other.
B: I wish to fly to Mars some day. That must be great fun.

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