第1个回答 2011-12-28
这是一个虚拟语气的用法,后面的动词是省略了should
在“It is +adj./n+that从句”中,that 从句常常用“(should)+动词原形”。这些形容词或名词有:strange, surprising, amazing, astonishing, wrong, important, necessary, essential, natural, possible, probable, ridiculous, desirable, advisable, preferable, urgent, insistent, better, funny, pitiful, eager, anxious, unthinkable, a pity, a shame, no wonder等。
类似的句子还有:
It is necessary that some immediate effort (should) be made.必须立即采取行动。
括号内表示should可省略。