If it did, it would open up its diversity program, now focused narrowly on race and gender, and look for reporters who differ broadly by outlook, values, education, and class.(2001年 TEXT1)
这是一个含有条件状语从句的复合句。If it did是条件状语从句。主句中主语是it;谓语动词有两个，分别是would open up...和look for...。
当it作形式主语，后面用形容词作表语，即在it is + adj.这样的句型中，当描述主语的表语形容词是advisable，critical，crucial，desirable，essential，imperative，important，incredible，inevitable，necessary，recommend，strange，urgent等形容词时，主语从句的谓语动词多用虚拟语气，如果是现在时，谓语动词用should/would +动词原形(should/would经常省略);如果是过去时，则用should/would + have done的形式。
It was inevitable that this primacy should have narrowed as other countries grew richer. Just as inevitably，the retreat from predominance proved painful.
表示“建议、请求、命令、要求”等主观意向的词(如：suggest、advise、assume、decide、demand、desire、insist、propose、order、recommend、require、suggest……)，引导宾语从句时需用虚拟语气。虚拟语气中的格式很固定：谓语动词用should+动词原形，should可以省略。注意这种句型中的虚拟语气形式不受主句动词时态的影响。Theories concerning on the individual suggest that children engage in criminal behavior because they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through interactions with others.(2004 CLOSE)
Such behaviour is regarded as “all too human”，with the underlying assumption that other animals would not be capable of this finely developed sense of grievance. (2005年 TEXT1)
Another decision is whether the school should be one of the vast majority financed by the State or one of the very small but influential minority of private schools，though this choice is，of course，only available to the small number of those who can pay. (英语专业四级考试01年Text D)