A

What can be done to promote unity and peace in Europe? Please elaborate on your answer.

Discord between individuals could be ascribed to a lack of understanding of others.

It would not be different for that between nations.

So the first step toward unity and peace would be for each country to abstain from insisting on its own interest to others.   ✔

 B

1. 관세가 붙지 않는 상품이 있습니까?

Are there any items freed from customs? ✔

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2. 당신을 만나 뵙고 싶습니다.

I would like to meet with you.  ✔

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3. 내일 뵐 수 있을까요?

Could I see you tomorrow?  ✔

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• Corrected: The sentences are corrected grammatically.