由于许多地方大片植物被破坏，带来沙尘暴和洪涝灾害，这给我们的启示是（    ）

①不能去改造自然界                      ②不能破坏环境

③要爱护地球上的其他生物          ④要保护地球

假如你的好朋友Lynn的父母对她期望很高, 希望她每科都拿到A, 她努力了但怎么也达不到。她写信给你, 希望能得到你的帮助。请根据以下要点提示写一篇英语短文。

要点提示:

1. 告诉父母你已尽力, 并跟他们讨论, 请教方法;

2. 向老师询问学习方法;

3. 按照父母以及老师教的方法学习, 不断努力。

要求:

1. 信中不得出现真实校名和姓名;

2. 条理清楚, 意思连贯, 语句通顺, 标点正确; 3. 80词左右。

下面是某生物兴趣小组设计的探究光合作用需要二氧化碳的实验装置和方法。将天竺葵放在黑暗处一昼夜，按图示装置好后，光照2~3小时。取下叶片A和B，去掉叶片中的叶绿素，然后用碘液分别检验。（提示：25％的氢氧化钠溶液能够吸收二氧化碳）

2009年11月，中国东方演艺集团有限公司、中国文化传媒集团有限公司、中国动漫集团有限公司同时在北京挂牌成立。三家公司是文化系统首批由经营性文化事业单位直接转制为国有独资公司的中央文化企业。国有文艺院团转企改制，意味着（   ）
①我国文化建设要把经济效益放在首位     ②我国文化产业发展的活力将进一步增强
③国有资产应在国民经济各领域占支配地位 ④我国社会主义市场经济体制日益完善

My aunt bought me a bicycle on my ninth birthday. She told me to learn to ride by 1. But I really didn’t know 2to ride a bike. What should I do? First, I watched the other people ride. Then I pushed out the bicycle from my house. I was 3 I’d fall down and hurt my knees. But I knew I had to get on it sooner or later. So I4 to get on just like what the other people did. But I fell off twenty 5 later. Just at that time, my aunt came out from the 6. She told me to practice again and again. So I got on the bike a second time, and fell off a 7 time. But I never gave up. I practiced a third time, a fourth time …. I could be on it 8 every time I tried again then before, 5 minutes, ten minutes, half an hour… until I could.
Like anything in life that you want to learn how to do or to be good at, you have to practice to 9 it happen. Diligent practice is the key to success10 you really want to learn to do a thing. More practice helps you to improve on the skills that you learn and ingrains （使根深蒂固）them in you until you can do it.