题目内容
1．Do you think it necessaryto set off fireworks（燃放烟花） in festivals？分析 你认为节日期间有必要放烟花吗？
解答 答案：to set off fireworks．
根据所给汉语提示结合语境推测句意是"你认为节日期间有必要放烟花吗？"，短语"燃放烟花"是 set off fireworks，此处根据设空处前面的it necessary判断应该填动词不定式，构成句式：it+形容词+to do sth．"做某事是…的"，it为形式主语，不定式为真正主语，所以答案是：to set off fireworks
点评 做这类题型，首先根据所给汉语明确句子所要考查的单词或短语的拼写，再结合相关语法知识对单词或短语做出形式上的变化．
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