请选择合适的介词或副词填空
1. On Children’s Day, I played and danced with my classmates.
2. I’m going to buy a lot of new dresses at Chinese New Year.
3. -Can you pick the apples up for the old woman? -Sure.
4. Su Hai gets a letter from her e-friend in the USA.
5. We shouldn’t cut down too many trees because trees help keep the air clean.
6. We can move some factories away from our city.
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