翻译下列句子。
1. You should be quiet when you are in the reading room.
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2. When I grow up, I'll be a nurse and look after patients.
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3. If you don't want to go alone, I'll go with you.
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4. After you use plastic bags, you mustn't throw them about.
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5. People in the USA can't drink beer or wine before they reach 21.
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1. 当你在阅览室时要保持安静。
2. 当我长大以后,我想成为一名护士照看病人。
3. 如果你不想一个人去,我陪你去。
4. 当你用完塑料袋后,千万不要到处乱扔。
5. 在美国,21岁以下的人不能喝啤酒或葡萄酒。
(答案不唯一)