应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit.

I find it necessary to know more about other countriesit necessary 不应该是it's necessary. 应该是It's necessary for keep fit.为什么正确答案确是It's necessary to keep fit. it's necessary是什么意思 It's necessary to learn English well. 翻译it's not necessary to hurry It's necessary这是什么形式? It's not necessary _________________(相同的) it's necessary for you to give up smoking(保持句子原意) it's necessary ____you____smoke realise it necessary还是realise It's necessary可以邦我讲讲么 It's necessary（ ）protect wild animalsIt's necessary（ ）protect wild animals. i think it's necessary to be friendly to others 的necessary用什么形式 It‘s necessary for us___(learn)English well说明原因 it's not necessary to be the same翻译 翻译：It's not necessary to be the same. It's not necessary to the same.这句改错 it's not necessary to be the same 英语翻译It's necessary for us to have a meeting. it's necessary for us to have healthy eating habits