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1、 The Moon (circle) the Earth every month.
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2、 It's necessary (learn) about the solar system.
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3、 We hope (protect) the Earth for future generations.
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4、 英汉互译(1)、Earth and its neighbors(2)、solar system(3)、natural resources(4)、renewable energy(5)、protect the Earth(6)、自然资源(7)、减少浪费(8)、节约水电(9)、气候变化(10)、宇宙的一部分
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5、 Learning about the Earth and its neighbors can e (激发) our interest in science.
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6、 The Earth and its neighbors are part of the u (宇宙).
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7、 Astronauts have been to the M (月球) and studied it.
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8、 We can use r (可再生的) energy, like solar power.
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9、 The Earth's c (气候) is changing, and we need to take action.
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10、 Let's work together to p (保护) our Earth and its neighbors.
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11、 It's important to s (节约) water and electricity.
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12、 P (行星) like Mars are interesting to study.
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13、 The Sun is the c (中心) of the solar system.
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14、 We should r (减少) waste to protect the Earth.
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15、 The Earth has a lot of n (自然的) resources.
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16、 We can learn about the s (太阳系) in science class.
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17、 S (星星) twinkle brightly in the night sky.
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18、 The M (月亮) circles around the Earth.
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19、 The e (地球) is our home, and we should protect it.
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20、 假如你是李华，你的澳大利亚笔友杰克（Jack）想了解你假期旅游过的一个地方。请你根据下面的提示内容，用英语给杰克写一封回信，向他介绍一下你去过的桂林（Guilin）。
提示内容：
1. 桂林的地理位置；
2. 桂林的特色景观，如山水风光等；
3. 你的旅游感受。
写作要求：
1. 短文中不得出现真实的校名和人名；
2. 词数80个左右（开头和结尾已给出，不计入总词数）。
参考词汇：be located in, landscape, be known for, vacation, look forward to
Dear Jack,
……
I'm sure you will have a good time here.
Yours,
Li Hua