It is necessary and important for students to take enough exercise

More and more people think it necessary to let .为什么这里只用it,而不是it is necessary to . It is necessary that you have support teams to bring water and drinks.It is necessary ________ _________ ________have support teams to bring water and drinks. if it is necessary /if necessary /when it is necessary 意思一样吗 it is necessary .it is necessary for them to learn the language in order to communicate with these people and to learn from them when it is necessary 为什么可以变为when necessary? It is necessary for us to ______knowledge and skills from various channles. It is necessary and important for students to take enough exercise Is it necessary and if so,what should be included?求前半句英文的中文翻译. it is necessary for you to remember some usefui words and e Helping the old and the weak is a good verture,and (still ),it is necessary for us to do.为什么、 it is necessary for you to work Is it necessary to learn grammer It is necessary for sb to early 是什么副词It is certainly necessary! It is necessary to do 的例句 Dreaming is a distinct and necessary part of sleeping,usually it...Dreaming is a distinct and necessary part of sleeping,usually (it characterized) by the occurrence of rapid eye movement (REM).分析中写到,括号内应该改为it is characterized Fill in each blank with the word given and change the form of the word if __答案是necessary .为什么不用it is necessary necessary and important to all people中的necessary 和important 的词性这句话是省略了主语吗 it is