It' necessary ____the classroom evevy day.[ ] A.to clean B.clean C.of clean D.for clean

it's necessary是什么意思 I find it necessary to know more about other countriesit necessary 不应该是it's necessary. if it is necessary /if necessary /when it is necessary 意思一样吗 when it is necessary 为什么可以变为when necessary? necessary I find it necessary to tell him about it.把 it necessary to tell 换成 that necessary to tell It's necessary to learn English well. it is necessary for you to work Is it necessary to learn grammer It is necessary for sb to 翻译it's not necessary to hurry early 是什么副词It is certainly necessary! It is necessary to do 的例句 It's necessary这是什么形式? It's not necessary _________________(相同的) I find ( ) him all about it.A.necessary to tell B.that necessary to tell C.necessary it to tell D.it necessary to tell 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