“it is …”句型是议论文写作中经常出现的句法结构，考生们应该有意识地做一些积累和记忆，以备平时操练及考试中使用。下面为相关句型的小的汇总，考生们可以反复操练，直至很自如地想到它，用到它。
1．it + 被动语态 + that…
1)it is widely recognized that extensive deforestation contributed to heavy summer flooding. （众所周知）
2)it is reported that 800000 applicants sat for the national master’s entrance test in 2003. （据报道）
3)it is estimated that two thirds of the cities of our country will be in acute shortage of fresh water by 2010. （据估计）
4)it is generally accepted that to practice euthanasia on a patient who is still alive is inhuman. （人们普遍认为）
5)it must be admitted that the price war will disturb the normal order of the market. (必须承认)
6)it cannot be denied that the overgrowth of tourism may destroy the ecological balance of some scenic resorts. （不可否认）
7)it is known to all that physical exercises can improve and enrich our physical and mental well-being. （众所周知）
8)it goes without s