解释句子。
根据自己的理解，用学过的英语解释下列句子。
要求：对画线部分做重点解释，写出的句子必须是对原句全句的解释，必须是完整的句子。
1. Long time no see.
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2. People make fun of others on April Fool's Day.
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3. This book is less interesting than that one.
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4. How do you like the song?
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5. The meeting came to an end at 7 o'clock.
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