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| | FUTURE VIEW | | | | |
 It will be great if there is some kind of fuel(燃料）we can use in cars that won’t produce any pollution. I guess there are scientists right now trying to do that, and I hope they’ll succeed because the world would be a much cleaner place, wouldn’t it? Charlie | |||||
| I think it will be great if they invent something so that we only have to sleep for one or two hours every day. Then we’d all have much more time to do things and to enjoy ourselves. Life would be better, I think, and everyone would do a lot more with their lives. Miguel | |||||
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| If I could choose anything, I’d go for a time machine so that I could go back and do some things differently. Of course, It will be great if there that’s impossible— but wouldn't it be great if it was possible? I wish I could go back in time to when I was a kid and say some of the things in a different way! Hannah | |||||
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| Well, of course, the best thing is medicine for rally bad diseases（疾病）.A lot of scientists are working very hard to stop diseases like Ebola, a terrible disease that has killed many thousand people in Africa. So if they found a special treatment for Ebola, or a way of completely preventing it, life would be easier in so many places. Isabella | |||||
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| I wish there was a machine that did homework! Wouldn’t tat be fantastic? But I guess teachers wouldn’t be very happy. Georgina | |||||
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1．Why does Hannah want to go back in time?
| A．To be young again. | B．To live a better life. |
| C．To do something for Africans. | D．To say some words differently. |
| A．Miguel. | B．Isabella. | C．Charlie. | D．Georgina. |
| A．Health. | B．Science. | C．Travel. | D．Education. |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
