摘要： Writing letters to your American pen friends is a good way to improve your English. 2. It’s raining outside. The boys have to do some indoor activities. 3. Eating enough vegetables every day is good for our health. 4. Smoking isn’t allowed in any public places in Shanghai. 5. His dream of owning a modern car has come true. 6. So far many people have applied to be volunteers for 2010 Shanghai Expo.

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