根据句子意思及所给单词首字母（或汉语提示），完成下列单词。
【小题1】It’s ppolite; to say “Thank you .” when someone helps you.
【小题2】Hainan iSmoking; is the second biggest in China .
【小题3】The movie was boring. I fell aasleep; half way through it.
【小题4】Summer holiday; （假期）is ing ,I’m going to visit Beijing.
【小题5】Smoking. (吸烟) is bad for your health.
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解析：根据句子意思及所给单词首字母，注意单词的适当形式。