It is necessary to protect trees from the frost.

It is necessary to protect trees from the frost. we found it necessary to protect the earth 为什么用it 而不是it is it is necessary to protect our traditional culture The trees produce a chemical to protect themselves from inse I think that it is necessary in protect the environment.用英语怎 英语语法She learned it necessary to protect the wild animals.nec We find ______ necessary to protect the earth.A.it B.this C. 最好说明理由哦2.To protect the environment is necessary【该为同义句】----- It is necessary for you to finish the work today 求批改Is It necessary to study the creative art? 英语翻译Before the merger & purchase,it is necessary to evaluate 英语翻译When it is necessary to communicate with the specificati