将英语句子中错误的地方改掉（把正确的句子告诉我）

将英语句子中错误的地方改掉（把正确的句子告诉我）
1. People can eat chocolate eggs at the Easter.
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2. A man on his right is a policeman.
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3. Jack is the his old friend.
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4. Sun is a circle.
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5. The boy is playing violin now.
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6. Does Jack live on first floor?
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7. There is a ‘e’ in the word 'date'.
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8. Shall we go to the park by the car?
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9. A policeman went to school and caught a thief today.
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10. People often go swimming in the summer.
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11. Helen comes from USA.
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12. Can you tell me way to the post office?
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