it\'s a good season for flying kites

it\'s a good season for flying kites 英语语法 急.在仁爱版本的初一下册出现了以下三个句子：1.It's a good season for flying k I think it's a good day__our kites.A.to fly B.flying 选择并解释为什 Is it a good day( )kites?A.flies B.fly C.flying D.tofly Today is Sunday.It's a fine day ____ flying kites.Many child It's for a good Spring is a good season to fly kites. You can fly your kites it's a good day to fly our kites.为什么用to fly?是不定式吗? -Let's fly kites this sunday - It s good 句型转换 People enjoy flying kites in this season.(对画线部分(flying it's good for 请帮我用It's a good time/season to do sth.造句,越多越好,